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The Beautiful Mind-Bending of Stanislaw Lem
By Paul Grimstad
In Stanisław Lem's writing, perverse invention and rational coherence lock into each other at weird, compelling angles.
Photograph from AP
The science-fiction writer and futurist Stanisław Lem was well acquainted with the way that fictional worlds can sometimes encroach upon reality. In his autobiographical essay "Chance and Order," which appeared in The New Yorker, in 1984, Lem recalls how as an only child growing up in Lvov, Poland, he amused himself by creating passports, certificates, permits, government memos, and identification papers. Equipped with these eccentric toys, he would then privately access fictional places "not to be found on any map." Some years later, when his family was fleeing the Nazis, Lem notes that they escaped certain death with the help of false papers. It was as if the child's innocent game had prophesied a horrific turn in history, and Lem wonders if he'd sensed some calamity looming on the horizon—if his game had sprung "perhaps from some unconscious feeling of danger."
The idea of a private world spilling over unsettlingly into reality is also at the heart of his novel "Solaris," from 1961, about a sentient ocean with the power of "seeing into the deepest recesses of human minds and then bringing their dreams to life," as the Lem fan Salman Rushdie once described it. The massive popularity of "Solaris"—made into a film by Andrei Tarkovsky, in 1972, and then again in 2002, by Steven Soderbergh, as a moody near-future love story with George Clooney—helped Lem become one of the most widely read science fiction writers in the world. Yet his writing reached far beyond the borders of the genre. In addition to many novels and stories, he composed a huge philosophical treatise on the relation of human beings and machines, a good deal of pungently argued literary criticism, a volume of reviews of nonexistent books, a stochastic theory of narrative fiction, an experimental detective novel, speculative essays dealing with artificial intelligence, cybernetics, cosmology, genetic engineering, game theory, sociology, and evolution, radio plays and screenplays. Such staggering polymathic curiosity over such a vast range of material, all of it explored with lucidity and charm, gives his writing a unique place on a Venn diagram in which the natural sciences, philosophy, and literature shade into one another with mutually intensifying vividness and fascination.
Lem also became known for a certain kind of techno fairy tale, some of which were collected in 1964 as "Fables for Robots." The stories are far from the robot pulp made famous by Isaac Asimov and are almost disturbing in their bristling plenitude: wind-up princesses with crystal minds, planet-size computers battling antimatter dragons, energy castles built in the interiors of glass moons, thinking mountains, clockwork clouds. Although the tales have the compact dimensions of fable, they often unfold with cosmological timescales ("the apprentice waited a thousand years, then another thousand, but the engineer did not return"), or their facets ramify with the logic of a Rube Goldberg contraption. I remember reading these stories in an English edition that I happened upon in my high-school library and feeling (to borrow a line from Emily Dickinson) as though the top of my head had been taken off.
The other "fables" seem to be cautionary satires about the psychic rot that breeds within totalitarian regimes. "Uranium Earpieces" imagines a greedy and suspicious king who lives in a platinum palace and requires that his subjects wear earpieces made of an electromagnetic uranium to prevent them from congregating. (The proximity of the earpieces creates a chain reaction leading to an explosion.) Another, "Trurl's Machine," tells of an eight-story-tall computer which insists that two plus two equals seven. When the inventor, Trurl, tries to coax it into giving the correct answer, the huge machine rears up and physically threatens him, stubbornly adhering to its answer. (Trurl is on the verge of acceding to a revision of mathematical truth when the machine breaks down.) Another tells of a ruler with a vast cybernetic military who laments the absence of enemies on which to use it, and so builds an equally vast cybernetic enemy against which to fight. (His subjects, at least those who survive, complain that these synthetic wars are an unnecessary extravagance.) Lem's novel, "Memoirs Found in a Bathtub," is an acid sendup of bureaucracy at its most insane and dehumanizing, as its bewildered memoirist navigates through a Department of Verification, Department of Misinformation, Department of Instructions, Department of Codes, eventually coming up against more sinister sounding subdivisions, like the Department of N.
Lem's incorrigibly curious mind was naturally drawn to philosophy and he wrote a massive work of speculative futurology, "Summa Technologiae," from 1964. The title is already a clue to the book's ambition. Where Thomas Aquinas, in his thirteenth century "Summa Theologica," wished to systematize all of Christian doctrine, Lem wrote a secular organon of human civilization's entanglement with machines. At the center of the book is the (at the time new) discipline of cybernetics. Systems of energy expenditure—like steam engines or people or fish or information itself—Lem called "islets of decreasing entropy," and, in the course of unfurling his explication of such systems, Lem rehearsed strikingly prescient versions of ideas that were at the time exotic at best. What he calls "phantomatics" we would now instantly recognize as virtual reality; "ariadnology" seems pretty close to a Google search engine (tracking Ariadne's thread of some sought-after piece of data through tangled labyrinths of information). There is also a penetrating and original discussion of Alan Turing's imitation game as imagined in his epochal 1950 essay, "Computing Machinery and Intelligence." Turing, the British logician who accidentally invented computer science in his effort to tackle the problem of completeness in mathematics (and also helped crack the German Enigma cipher, leading to Allied victory in the Second World War), imagined a criterion for determining if a computer can be called intelligent. If an interrogator can't tell the difference between a human respondent and a machine, the machine must be counted as thinking (now commonly known as the Turing Test). When confronted with all of the branching possibilities of how a conversation might unfold during such a test, Lem, in his "Summa," imagined a "Cosmic Gramophone," which would "record not only particular answers to possible questions but also whole sequences of conversations that can potentially take place [and thus] requires memory . . . which probably cannot be contained in the solar system." And the historical counterfactual—the eternal friend of the science-fiction writer—comes up in the "Summa" in typically playful scenarios, as when Lem wonders how human history might have unfolded had there been typewriters in the Mesozoic era.
The scrupulous review of a nonexistent book—a genre more or less invented by Jorge Luis Borges—was utterly suited to Lem's ludic sensibility, and he took the form to exhilarating extremes. Among the books under discussion in his collection "A Perfect Vacuum," from 1971, is a modernist novel of Joycean ambition based not on "The Odyssey" but on "Gilgamesh," called "Gigamesh," which expounds upon the significance of the missing letter "L," complete with a commentary by the (fictional) author more than twice as long as the novel. Another—"Gruppenführer Louis XVI"—is about a Nazi officer who defects to Argentina after the war with a trunk full of cash, heads to the countryside where he enslaves the natives, and commands them to build a meticulous re-creation of the world of Louis the XVI. Anyone who so much as intimates that the surrounding castle and court life are not absolutely real is tortured and shot. (This piece makes one wonder if Lem might have been the source for Roberto Bolaño's own compendium of reviews of nonexistent books, "Nazi Literature in the Americas.") Another is a pitch-perfect sendup of the nouveau roman and the breathless structuralist theorizing that went with it; another invents an Italian pastiche of Dostoevsky's "The Idiot," then faults it for an insouciant lack of reverence for the original. Taking the premise to its vertiginous reductio, the introduction to "A Perfect Vacuum" is a review of "A Perfect Vacuum" by a certain "S. Lem." These delightful pieces end up transcending their constraints and become tales of pure information, occupying the rarified upper air where we also find Borges's "Pierre Menard" and Nabokov's "Pale Fire."
Lem wrote lots of actual reviews, too, many of them about American science fiction, which he mostly did not like. In one piece, he notes that "the scientific ignorance of most American science-fiction writers was as inexplicable as the abominable literary quality of their output." Another compares H. G. Wells to someone who has invented chess, then accuses Wells's American successors of merely "applying the rules only with smaller or larger variations." Such judgments did not go over well with many in the American S.F. community, and in 1976 the Science Fiction Writers of America revoked Lem's honorary membership. (Amid the kerfuffle that followed Lem's excommunication, a rumor arose that he had to denigrate "Western" science fiction to appease Polish authorities.) Still, he had unreserved admiration for Philip K. Dick—whom he called a "visionary among charlatans"—and was attentive to non-S.F. American fiction. He read and admired Saul Bellow's "Mr. Sammler's Planet," thought its ruminations about life on Earth in the wake of the 1969 moon landing profound, yet nevertheless took Bellow to task for the inaccuracy (when Mr. Sammler is remembering his own childhood as a Jew in Poland) of giving a maid a name that could not have been Polish. In other pieces, we get a sense of Lem's views on literary taxonomy, as when he claims that a reader interested in crime should read Dostoyevsky but not Agatha Christie. Still, Lem admitted to a weakness for detective stories and wrote one himself, "The Chain of Chance," a novel as much about probability and chaos theory as it is a whodunit.
The question of what sort of Lem we get in translation is an often tangled one. For many years, "Solaris" existed in English only through a French translation of the Polish. The "Summa Technologiae" was made available in English in 2014, in a, as far as I can tell, lucid translation by Joanna Zylinska. John Updike, a regular reviewer and admirer of Lem's work, liked Michael Kandel's English translation of Lem's stories enough to call them "marvellous" (though one wonders how much Polish Updike knew). And Lem himself was known to break with various of his translators, apparently unsatisfied with how the many Russian and German and French and English editions of his books turned out (all languages he read). Still, one can get pleasure from reading him in much the same way one enjoys the cognitive frisson of a thought experiment. Like Einstein's theory of relativity asking us to imagine a set of twins, one of whom remains on Earth while the other approaches the speed of light such that the Earth twin ages faster—the premise, incidentally, of Lem's novel "Return From The Stars"—Lem can be read profitably at the level of ideas alone. If Updike calls Lem a poet of "scientific terminology" and says his books are thrilling "especially for those whose hearts beat faster when the Scientific American arrives each month," it is that synthesis of style and fact that has allowed Lem to have survived translation at least enough to have become one of the most widely read science-fiction writers of all time.
In an essay on Borges, Lem said he loved the story "Tlön, Uqbar, Orbis Tertius" because it had a "perverse, but logically perfect structure." The same could be said for much of Lem's best writing. Perverse invention and rational coherence lock into each other at weird, compelling angles in his work. And it's no wonder he liked "Tlön," a story about an entirely fictional planet which slowly usurps the actual history of the Earth. It's a version of how Lem's fabricated government documents ended up, according to some occult mechanism of the imagination, seeing a little way into the future. They seem also to have been Lem's passport into a life of writing, in which he set out not so much to transmit knowledge or expound a philosophy as to amaze.
Paul Grimstad's essays and reviews have appeared in numerous publications, including Bookforum, The London Review of Books, and n+1.
Nouveau Science Fiction: The Screenwriter Jonathan Nolan Discusses "Interstellar"
During a panel discussion on science-fiction writing, the producer and screenwriter Jonathan Nolan talks about how he came up with the vision of Earth in the film "Interstellar."
Close Encounters with O. Schrauwen's Mesmerizing "Parallel Lives"
A dazzling and disorienting collection of four short stories detail the cartoonist's interactions with the future.
By Françoise Mouly
Agnès Varda's Lost Sci-Fi Romance, "Les Créatures"
In a 1966 movie starring Catherine Deneuve, Varda transformed science fiction into a subject in her own image.
By Richard Brody


For this stationery suite we wanted to show how timeless elegance collides with a modern edge.
We opted for a simple colour palette: black, white & gold. Minimalist fonts combined with a calligraphic brush font gave it that modern twist.


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Every Day è un film del 2010 scritto e diretto da Richard Levine e interpretato da Liev Schreiber e Helen Hunt. È la storia di una famiglia che lotta con gli imprevisti della vita.

Trama
Ned è uno sceneggiatore di un programma televisivo in piena crisi di mezz'età. Il suo lavoro non è soddisfacente, il figlio quindicenne è gay e l'altro figlio undicenne è spaventato da tutto, la moglie Jeannie decide di ospitare a casa loro il padre malato e la situazione familiare si complica ulteriormente. Inoltre Ned si avvicina alla bellissima collega Robin.

Collegamenti esterni

redpajama_set_name: RedPajamaWikipedia


Built in 1995, Kendale Lakes North Sec 9 is a 84 unit condominium located in the Kendale Lakes (N of Sunset Dr.- W of SW 137th Ave) submarket in Miami, Florida. This community has 1 condo unit for sale starting at $239,500 and 1 condo unit for rent starting at $1,600. For more information on Kendale Lakes North Sec 9, explore the other tabs at the top of this page. If you are interested in buying or renting a unit, click the "Condos for Sale and Rent" tab to see what is currently available, or click here to contact an approved realtor.
I would like more information on units at Kendale Lakes North Sec 9.


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Don't Sell Your Birthright, Pastors Perspective, How to Live Like Jesus in Election Season & More
by Calvary Chapel Nov 06, 2020
"Don't Sell Your Birthright for Sex"– The Gospel Coalition
"My friend ultimately surrendered to his feelings, and to his boyfriend's pleas, and made a conscious decision to walk away from the Lord and pursue this relationship. He knew deep down that living a homosexual life is incompatible with the teaching of the Bible, but he was tired of fighting his desires. Like Esau in Genesis 25:29–34, he wanted his stew now."
"Four Practical Ways to Live Like Jesus in Election Season"– CalvaryChapel.com
"For followers of Jesus, this moment presents a very important choice. We can contribute to the noise in a remarkably noisy season, or we can be messengers of peace in a country that desperately needs it."
"Why Evangelicals Disagree on the President"– Christianity Today
"The reason we're divided, and how we can come together."
"Pastors Perspective with Pastors Tommy Cota and Bill Buffington"– KWAVE
"Pastor Bill Buffington of Calvary Chapel Inglewood will be joining us with Pastor Tommy Cota of Hope Alive Church"
"Fanny Crosby: Women Worth Knowing"– Gracious Words
"Fanny Crosby (1820-1915): Fanny Crosby was blinded at infancy--yet this didn't stop her from becoming one of the most prolific hymn writers and important figures in the history of American worship! Join us as we talk about this incredible woman who chose to glorify God in spite of her blindness and found that in her weakness, He was made strong!"
"Introducing Cinthya Rios: Esp.calvarychapel.com Translator!"– CalvaryChapel.com
"We are excited to first introduce Cinthya Rios who manages esp.calvarychapel.com! She is a part of the CGN and CalvaryChapel.com Team and assists with the Spanish translation for our CGN conferences! Below is a note from Cinthya, an excerpt of an article from CalvaryChapel.com that is available in Spanish, and an interview with Cinthya!"
The Link is a collection of content from around the web, discussing topics in culture, theology, ministry and current events. CalvaryChapel.com does not necessarily endorse or agree with every message or perspective in the diverse pieces posted on The Link. By providing The Link, we hope to help you stay informed of important events and conversations taking place in the world that are relevant to the Christian faith.
A one-stop online-hub for Calvary Chapel and the Calvary Global Network
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redpajama_set_name: RedPajamaCommonCrawl


Is it a safe place, under a rainbow? What about a double rainbow? If it was, guess where I would put ........... well, everyone I know!
And all through this time, cml travelled along with me, but mostly at the back of my mind. I found very little need to talk about it at all. I honestly think that deep down, I really needed a good long break from this cml thing - and I mostly succeeded. It was interesting to realize that it was during our wait in Miami for the connection flight back to Atlanta, that that is when cml came back again, dates started running through my head and started feeling the need to catch up with everyone and the latest cml news. I am so incredibly fortunate that Steven is doing so well that putting this all on hold was even possible.
During my catch up after we got home, I found this blog entry on Matt's Blog. It's about approaching a stranger who obviously has cancer, even though you don't know them. Under what circumstances is it right? When we were on the ship in the Galapagos Islands..... well, this is my latest experience on that subject........ I overheard a small group of people discussing a lady who had just joined the ship - she had had her last cancer treatment on the Monday and here it was Wednesday and she was on board for a vacation. They debated whether it was right for her to do this, whether she was wise or sensible and how to react to her. In all honesty, maybe I would have been one of them a good many years ago, but these past few years had taught me some lessons and now I was slightly ticked off at this discussion.
It was not long before a tall, elegant lady caught my attention - she had the most glorious smile, was tall and her eyes twinkled. She seemed to ooze life and laughter and everyone around her broke into smiles as she almost bounced along the deck. And then she removed her cap, running her hand over her bald head as if she still had a full head of hair. This was her.
Oooooh, my feet started tapping as they wanted to go over to her and say something - anything. To tell her that......well, that I see that she had/has cancer and that........ what? WHAT?? She knows what she has/had........ did she really need me to come and tell her my version of what I saw in such a short time while she was on a probably much needed vacation to one of the most wonderful spots in the world? Did she need my sympathy or 'understanding'? Did she need to hear the story of Steven and how I deal with it? Did she? Nope... Not at all.
I am so incredibly grateful that I sat on my feet and put cottonwool in my mouth for the next couple of days. And then one morning, I found myself sitting next to this bubbly, bouncing, vibrant lady with the never-ending smile, on a the edge of a small inflateable dingy on the way to one of the islands, and we laughed and chatted and laughed some more at some stupid fish jumping out of the water right into the beaks of the swirling masses of birds above. She was funny, interesting and having a great time out on the water and we really had a good and fun ride. After that we spoke a good many times, laughing, sharing what we had seen during the day and just enjoying the islands.
We did not share any personal information, not even our names, until it was time to leave the ship. She had a calendar that the crew had given her and she was laughing because it was a 2009 calendar and well, the year is almost over! I called her "Calendar Girl", she laughed and said that her name is Laura and we hugged both hello and goodbye. The last I saw of her was when I called after her disappearing figure at the airport, "bye bye, Calendar Girl!" and her tinkling laughter trickled around the corner back to me...... still makes me smile.
Well Laura, you taught me something. You taught me, as a good few other have too, that cancer is not the main part of any person by a very long way. Your character happened first, your smile, that twinkle in your eye and your zest for life. Cancer is just a small part of you - small enough that it was hidden by all the rest of your lovely personality. You taught me that even though I have 'a story', your privacy is more important and that by respecting that, I gained so much. I saw a part of you..... a wonderful part. Thank you!
I have also learned that I can and do see past cancer to the whole person. This is something I never thought could happen so easily. I know I do this with Steven and some of my internet friends...... he is doing well enough that cml really is not the first thing I think of when I see or think of him. Even my Robo-scan has become lazy and I really see my son first and foremost - just as it should be. But it was a really good surprise that I can and did do this with someone that I literally just met and who's side effects of the treatment were very obvious. I love knowing that I have grown enough that I am no longer part of that group wondering how to react to someone who has cancer.
And just a day or two after getting home, it was time for the PCR test kit to be ordered again. Sigh. It arrived, Steven's blood drawn again on Thursday last week and now for the wait again. I have been catching up, as I said, with some of the people I follow and one that really has my attention is Hans' Blog. Both Gleevec and Sprycel have stopped working for Hans due to the T315 mutation, and he is off onto a trial and hopefully going to be able to avoid a transplant. The wonderful news is that he has a sibling match which is just great! Visit his blog and send him wishes and hopes... All the best Hans - I will be waiting to celebrate great results with you all!
Now I know that everything is going well with Steven, but what would one of my blogs be without a good foot stomping from me? Maybe it's because of that pcr kit and the waiting, maybe its........ well...... Here it is. I don't want Steven to have a 'good few other medications' to fall back on if Gleevec stops working..... I don't want him to have to go to trials, or to have a perfect match for him if he has to go to transplant one day (well of COURSE I do want all these!) But I want him to just be ok the way its going! I want him to never have to worry again, I never want to worry about how I would deal with him having to change his medications and deal with new parameters, tests and side effects. I want to see this burden lifted from him and Laura and I want the road to be smooth from here on out. I want to stomp my feet in a hissy fit and absolutely insist that this child of mine (and my girls) be absolutely ok.
Beautiful pictures and beautiful words as always. I am so glad you got to have that remarkable trip and share your stories with us.
I love the story of "Calendar Girl" and I will share that with my good friend who is battling cancer.


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Fast Chat with singing gem Jackie Evancho
Jackie Evancho 's new CD " Heavenly Christmas" to be released on November 8, 2011. Credit: Keith Munyan Photo/
When Jackie Evancho steps onto the stage at Avery Fisher Hall Monday night, she will become the youngest singer to perform solo at Lincoln Center. But that isn't the only big event going on in the life of the 11-year-old who burst into the national consciousness last year as runner-up on "America's Got Talent." The soprano prodigy, who became the youngest Top 10 debut artist with her "O Holy Night" album a year ago, also became the youngest soloist on PBS' "Great Performances" series in June. That month, her "Dream With Me" CD opened at No. 2 on the Billboard charts behind Eminem, and her latest, "Heavenly Christmas," came out Tuesday.
Now, she's acting in her first film, Robert Redford's "The Company You Keep," a political thriller with an all-star cast due out next year. In a month, the classical crossover singer will appear on television four times in five days. Those shows assuredly will be added to the more than 500 videos of her already on YouTube, led by her singing "O Mio Babbino Caro" with 10 million views. The sixth-grader carries a laptop on the road for "cyberschool" and still finds time to respond to fans on Facebook and Twitter.
After recently returning from triumphant shows in Tokyo, Jackie spoke by telephone with Newsday's Alan H. Fallick from suburban Pittsburgh, where she lives with her parents, two brothers, sister and pet menagerie.
How was Japan?
Japan was phenomenal, and the architecture was beautiful. There's so much to see.
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Were the audiences different?
Yes, the people there were a lot more polite. Oh, people in the United States are polite, too, but they're more polite there. I had a translator, and she was nice, but it was weird.
You're coming to Lincoln Center. What do you think of New York?
I like the way the city looks and all the historical structures.
Do you get nervous onstage?
Yes, I do get nervous -- I always get a little bit nervous. Sometimes, my stomach hurts, and I have butterflies.
Does it take long to get a song ready, especially in a foreign language?
It doesn't take long. It's very simple, actually. Latin and Italian are similar. There are a lot of songs that I can learn.
What are your favorites?
I love a certain French song because it has a lot of emotion. It's like a lullaby. I like songs that just move me.
Who decides which songs you'll perform or record?
A group decides all the songs. If my mom, the producer and I like a song, we'll do it.
What if they like it and you don't?
Sometimes, people convince you to do it. If you say no, they'll convince you. But that doesn't happen much. I really stick to my own impressions.
You've recorded gorgeous duets with Barbra Streisand and Susan Boyle. Who would you like next?
I'd love to sing with Charlotte Church, Andrea Bocelli and all those great voices.
I hear you're making a movie.
Yes, we started a month ago. I play the main character's daughter. I never thought I'd be in a movie now. I thought maybe when I get older. It's very exciting.
Mr. Redford is in the movie with you?
Yes, but I wouldn't say it that way. I'd say, "I'm in the movie with Mr. Redford."
Is acting hard?
It's not as hard as singing. It's a lot of fun. It changed my perspective on acting. Sure, acting is easier than singing, but getting emotional is hard. Because you're not singing a song. You're putting out your emotions in front of all those people. Sometimes, we do three or four takes, sometimes five or six. I like challenges.
How are your beautiful dresses picked?
I have a stylist, and my mom and I all narrow down the choices. Then, it's perfect.
Your fans don't know a lot about you. Let's find out some of your favorite things. Favorite food?
Crab.
Snack?
Pop-Tarts.
Favorite song to listen to?
"Golden Age" from the Galaxy Asteroids Tour.
Favorite song to sing?
I love them all too much to pick one.
Singer?
Lady Gaga. I like "Poker Face."
Favorite movie?
"Phantom of the Opera." My opinion on that will never change.
TV show?
"Avatar: The Last Airbender," "SpongeBob SquarePants" and "Wizards of Waverly Place."
Favorite school subject?
I love language arts. I love writing and reading poetry.
Your songs sound like poetry. What's your favorite on your new CD?
I love "Believe." I loved making the album, and I can't wait to make another.
Top Entertainment stories
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Students from at least three Missoula schools walked out of class at noon in Missoula in solidarity with teens from Florida who met with their state legislators in an effort to pass new gun laws.
Some of the signs held by students at Hellgate High School read: 'Our Right to Live is Worth More than Your Right to Buy an AR-15', 'Life Over Guns' and 'Who's School is Next'.
Art teacher at Hellgate, Jeff Brown, who was escorting the students down Higgins toward the bridge, said a fire alarm went off inside the building just moments before the march was scheduled to begin, emptying the entire building.
Brown said when the students asked for his permission to leave class and march down Higgins, he explained the school's policy on unexcused absences.
Students from Big Sky High School and Washington Middle School reportedly also left class in protest.


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Home Design RF Home Co by Rescued Furnishings opens large Kirkwood location
RF Home Co by Rescued Furnishings opens large Kirkwood location
The grand opening of the 19,000-square-foot retail spot is set for April 13.
by Megan Mertz
Courtesy Nicole Genz
For months, Nicole Genz drove past the empty building at 11022 Manchester Road, wondering when it would become available for lease. As soon as the sign went up, she called to inquire, and now her business, RF Home Co by Rescued Furnishings, is set to open there on April 13.
Genz and her husband, Brandt, began Rescued Furnishings in their home in 2013. They've had several locations since then—first in Kirkwood and most recently on Lafayette Avenue—but they've been looking for a larger space where they could bring together the two sides of their burgeoning business: home décor shop and cabinetry services.
At 19,000 square feet, the Manchester Road building had room for that and more. "This is a big endeavor," she says. "But in this store, we can do full, blow-out areas that we just didn't have space for in the other store."
Those elaborate displays include two kitchens, a nursery, a clothing boutique built like a walk-in closet, and a man cave—all showcasing not only the products they carry, but also the home renovation projects they can do for clients.
The additional space also gave Genz the opportunity to expand the number of small businesses she could carry in the retail section of the store. Instead of having half a dozen, RF Home Co by Rescued Furnishings now features products from more than 40 vendors, many of them local. Products run the gamut, from baby clothes to furniture to handmade cosmetics to pet products to men's and women's accessories.
Genz says she received hundreds of applications from potential vendors. Of those, she chose high-quality, unique items that she would want in her own home.
"We were already big on things made in the U.S. and by crafters and small businesses. We are able to do that on a much larger scale here," she says.
According to Genz, the business is currently about 50 percent retail and 50 percent cabinetry services, and she expects that to continue. "We paint existing cabinets, reface, and build from scratch," she says. "It gives us a unique opportunity to do something between those things."
RF Home Co by Rescued Furnishings will be open seven days a week: 11 a.m. to 6 p.m. Monday through Friday, 10 a.m. to 5 p.m. on Saturday, and 10 a.m. to 4 p.m. on Sunday. Stop by during regular hours on April 13 for the business's grand-opening celebration.
Retail Opening


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Marvin Guido Rettenmaier (10 september 1986) is een Duits professioneel pokerspeler. Hij won onder meer het 25.000 + 500 No Limit Hold'em - Championship van het World Poker Tour World Championship 2012 (goed voor een hoofdprijs van $1.196.858,-) en het $4.000 + 400 No Limit Hold'em - Main Event van de WPT Merit Cyprus Classic 2012 (goed voor $287.784,-).

Rettenmaier won tot en met juli 2014 meer dan $4.750.000,- in live pokertoernooien (cashgames niet meegerekend).

Wapenfeiten
Rettenmaier speelde zich voor het eerst in het prijzengeld op een professioneel live pokertoernooi in 2009. Hij werd toen tweede in het €1.500 No Limit Hold'em - Main Event van het Christmas Poker Festival in Wiesbaden. Zes maanden later behoorde hij voor het eerst tot de prijswinnaars op de World Series of Poker (WSOP). Op de editie van 2010 werd hij zevende werd in het $1.500 No Limit Hold'em-toernooi en haalde hij ook op twee andere toernooien een cash. Rettenmaier scoorde later in 2010 ook voor het eerst een met prijzengeld beloonde klassering op een hoofdtoernooi van de World Poker Tour (WPT). Hij werd toen elfde op de WPT Amneville. Weer twee maanden speelde hij zich voor het eerst in het prijzengeld in het derde grote pokercircuit, de European Poker Tour. In het hoofdtoernooi van het PokerStars Caribbean Adventure editie 2012 eindigde hij als 192ste.

Rettenmaier won in 2012 zowel het WPT World Championship 2012 als het WPT Merit Cyprus Classic 2012 en werd daarmee de zestiende speler ooit met meerdere WPT-titels achter zijn naam. Daarbij was hij de derde speler ooit die twee hoofdtoernooien won in één kalenderjaar, na Daniel Negreanu (in 2004) en Cornel Cimpan (in 2009).

Rettenmaier, Marvin


text:
\section{Introduction}

The Minimal Supersymmetric Standard Model (MSSM) is one of the most popular new physics
models beyond the Standard Model (SM). In the MSSM, R-parity conservation is imposed in
order to keep the proton stable. R-parity is a discrete symmetry, which is defined to be
$R_p \equiv (-1)^{3(B-L)+2S}$, where $B$, $L$ and $S$ are baryon number, lepton number,
and spin, respectively. All SM particles have $R_p = 1$, and all superpartners have $R_p
= -1$.  In consequence, the superpartners can only be produced in pair, and the lightest
superpartner (LSP) is stable. However, proton decay may be avoided by assuming $B$ or $L$
conservation, but not both. In these cases, R-parity can be violated. For a recent review
of the R-parity violating ($\not\!{R}_p$) extension of the MSSM, see Ref.~\cite{hep-ph/0406039}.

The most general form for the $\not\!{R}_p$ part of the superpotential is
\begin{equation}\label{eq:sp}
  W_{\not\!{R}_p} = \mu_iL_iH_2 + \frac{1}{2}\lambda_{ijk}L_iL_jE_k^c +
  \lambda'_{ijk}L_iQ_jD_k^c + \frac{1}{2}\lambda''_{ijk}U_i^cD_j^cD_k^c,
\end{equation}
where $L_i(Q_i)$ and $E_i(U_i,D_i)$ are, respectively, the left-handed lepton (quark)
$SU(2)$ doublet and right-handed lepton (quark) $SU(2)$ singlet chiral superfields, and
$H_{1,2}$ are the Higgs chiral superfields. The indices $i,j,k$ denote generations and
the superscript $c$ denotes charge conjugation. As stated before, we require that the
lepton number violating part and the baryon number violating part should not exist
simultaneously. For the purpose of this paper, we will assume that only the lepton number
violating couplings $\lambda'_{ijk}$ are non-zero. A recent summary of the bounds on the
couplings in Eq.~(\ref{eq:sp}) can be found in Ref.~\cite{hep-ph/0406029}.

The $\not\!{R}_p$-MSSM has the remarkable feature that sparticles need not be produced in pair.
Therefore, a definitive signal of R-parity violation will be the observation of single
sparticle production. The terms in Eq.~(\ref{eq:sp}) will result in various resonant
sparticle production processes. The term involving $\lambda_{ijk}$ leads to resonant
sneutrino production at $e^+e^-$ colliders \cite{epem}, while the $\lambda''_{ijk}$ term
leads to resonant squark production in hadron-hadron collisions
\cite{Phys.Rev.D41.2099,sqhh}. The term with $\lambda'_{ijk}$ can induce both resonant
squark production at $ep$ colliders \cite{Nucl.Phys.B397.3} and resonant slepton
production at hadron-hadron colliders \cite{Phys.Rev.D41.2099,slhh,Phys.Rev.D63.055008}.
We will consider the last case in the following.

The resonant production of a single slepton can lead to interesting phenomenology at
hadron colliders. A charged slepton can decay into a neutralino and a charged lepton, and
the neutralino can subsequently decay into a charged lepton and two jets via $\lambda'$
couplings.  Due to the Majorana nature of the neutralino, the two leptons can have either
opposite or same charges. The case of two leptons of the same charges is more interesting
due to the absence of large SM background. For a detailed analysis of the signal and the
background, see Ref.~\cite{Phys.Rev.D63.055008}. For a sneutrino, the decay products can
be a chargino and a charged lepton. With the subsequent decay of the chargino, the final
state could contain three charged leptons which is also a clean signature.

The analysis in the above is all based on the tree-level cross sections. It is well known
that in order to reduce the scale dependence of the cross section and get more precision
predictions, one must include the QCD radiative corrections. The next-to-leading order
QCD corrections to the total cross sections have been calculated in
Ref.~\cite{Nucl.Phys.B660.343}.  However, they used rather old parton distribution
functions in the numerical calculations, and their results have large dependence on the
PDF sets used. Moreover, they did not consider the kinematic distribution of the events,
which is very important in designing the strategy of discovery. In this paper, we will
calculate the transverse momentum distribution of the slepton at next-to-leading order in
QCD, and also calculate all order soft gluon resummation effects to give reasonable
predictions. In our numerical evaluations, we will use the new sets of PDFs, and compare
our predictions for the total cross sections with those of
Ref.~\cite{Nucl.Phys.B660.343}.

The paper is organized as follows. Section~\ref{sec:proc} describes the production
processes at hadron/parton level and shows the leading order (LO) cross sections.
Section~\ref{sec:nlo} presents the analytical expression of the next-to-leading order
(NLO) corrections to the cross sections. Section~\ref{sec:total} gives the analytical and
numerical results for the total cross sections and Section~\ref{sec:qt} gives the
transverse momentum distribution. And finally is the summary.

\section{The processes and the cross sections}\label{sec:proc}

We consider the process $A(p_1) + B(p_2) \to L(q) + X$, where $A$ and $B$ are the
incoming hadrons (proton-antiproton for Tevatron or proton-proton for LHC) with momenta
$p_1$ and $p_2$, $L$ stands for charged slepton $\tilde{l}$ (or sneutrino $\tilde{\nu}$)
with momentum $q$. At parton level, four kinds of subprocesses can be induced by the
$\lambda'_{ijk}$ couplings at tree level: $d_k + \bar{u}_j \to \tilde{l}_i$, $d_j +
\bar{d}_k \to \tilde{\nu}_i$, and their charge conjugated processes.

In the QCD improved parton model, the hadronic differential cross section can be
factorized into the convolution of the partonic differential cross sections with
appropriate parton distribution functions (PDFs):
\begin{equation}
  \frac{\mathrm{d}\sigma^{AB}}{\mathrm{d}{q_T^2}\mathrm{d}{y}} = \sum_{\alpha,\beta} \int \mathrm{d}{x_1}
  \mathrm{d}{x_2} \frac{\mathrm{d}\hat{\sigma}^{\alpha\beta}}{\mathrm{d}{q_T^2}\mathrm{d}{y}}
  f_{\alpha/A}(x_1,\mu_f) f_{\beta/B}(x_2,\mu_f),
\end{equation}
where $\hat{\sigma}^{\alpha\beta}$ is the cross section for the partonic subprocess
$\alpha(\hat{p}_1) + \beta(\hat{p}_2) \to L(q) + X$. $\hat{p}_1$ and $\hat{p}_2$ are the
momenta of the incoming partons $\alpha$, $\beta$. The momenta fractions $x_1$ and $x_2$
are defined by $x_i=\hat{p}_i/p_i, (i = 1, 2)$. $f_{p/H}(x,\mu_f)$ is the parton
distribution function which describes the probability of finding a parton $p$ with
momentum fraction $x$ inside the hadron $H$ at factorization scale $\mu_f$. The sum is
over all possible initial partons which contribute. For any momentum $q$, it can be
decomposed as
\begin{equation}
  q = (q^+, q^-, \vec{q}_T), \qquad q_T^2 = \vec{q}^2_T,
\end{equation}
where $q^\pm = q^0 \pm q^3$, and the rapidity $y$ is defined as
\begin{equation}
  y = \frac{1}{2}\ln\frac{q^+}{q^-}.
\end{equation}
We work in the center-of-mass frame of the colliding hadrons, in which
\begin{equation}
  p_1 = (\sqrt{s}, 0, \vec{0}_T), \qquad p_2 = (0, \sqrt{s}, \vec{0}_T),
\end{equation}
where $s=(p_1+p_2)^2$ is the center-of-mass energy squared.

The partonic cross section $\hat{\sigma}^{\alpha\beta}$ can be calculated order by order
in perturbation theory. The leading order contribution is the Born level process
$\alpha(\hat{p}_1) + \beta(\hat{p}_2) \to L(q)$. Here $\alpha$ and $\beta$ represent only
quarks and anti-quarks. The matrix element is simply
\begin{equation}
  \mathcal{M}_B = \lambda'_{ijk} \bar{v}(\hat{p}_2) P_L u(\hat{p}_1)
\end{equation}
where $P_L=(1-\gamma^5)/2$, and we have ignored the mixing between the left-handed and
right-handed sleptons since they are almost degenerate. The coupling $\lambda'_{ijk}$
depends on the generations of $\alpha$, $\beta$ and $L$. For simplicity, we will make the
subscript implicit below and simply write $\lambda'$. The one particle phase space can be
written as
\begin{align}
  \mathrm{d}\Phi_1 &= \frac{\mathrm{d}^3q}{(2\pi)^32q_0} (2\pi)^4 \delta^4(\hat{p}_1+\hat{p}_2-q)
  \notag \\

  &= (2\pi) \mathrm{d}{q_T^2} \mathrm{d}{y} \, \delta(q_T^2) \delta(\hat{p}_1^+-q^+)
  \delta(\hat{p}_2^--q^-).
\end{align}
After convoluted with the PDFs, the differential cross section with respect to the
transverse momentum and rapidity of the slepton is
\begin{align}
  \frac{\mathrm{d}\sigma_B}{\mathrm{d}{q_T^2}\mathrm{d}{y}} &= \frac{\pi}{m^2s}
  \overline{\modsq{\mathcal{M}_B}} \, \delta(q_T^2) f_{\alpha/A}(x_1^0,\mu_f)
  f_{\beta/B}(x_2^0,\mu_f) \notag
  \\
  &= \frac{\pi}{12s} \lambda'^2 \, \delta(q_T^2) f_{\alpha/A}(x_1^0,\mu_f)
  f_{\beta/B}(x_2^0,\mu_f),
\end{align}
where $x_1^0=\sqrt{\tau}e^y$ and $x_2^0=\sqrt{\tau}e^{-y}$ with $\tau=m^2/s$, and $m$ is
the mass of the slepton. We have made the summation over the initial states $\alpha$,
$\beta$ implicit.

\section{Next-to-leading order calculations} \label{sec:nlo}

The NLO QCD corrections consist of the following contributions: the exchange of virtual
gluons and the corresponding renormalization counterterms, the real gluon emission
subprocesses, the gluon initiated subprocesses, and the contributions of Altarelli-Parisi
(A-P) splitting functions. In the following, we will calculate these contributions
seperately. We use dimensional regularization (DREG) in $d=4-2\epsilon$ dimensions to
regulate all divergences and adopt $\overline{\text{MS}}$ renomalization and factorization
scheme to remove the ultraviolet (UV) and infrared (IR) (including soft and collinear)
divergences.

\subsection{Virtual gluon exchange}

Evaluating the relevant Feynman diagrams of virtual corrections, we obtain the amplitude
\begin{equation}
  \mathcal{M}_V = \mathcal{M}_B \frac{\alpha_s}{2\pi} C_F (4\pi)^\epsilon
  \Gamma(1+\epsilon) \left[ -\frac{1}{\epsilon^2} - \frac{1}{\epsilon}
    \ln\frac{\mu_r^2}{m^2} - \frac{1}{2} \ln^2\frac{\mu_r^2}{m^2} + \frac{2\pi^2}{3} - 1
  \right],
\end{equation}
where $C_F = 4/3$ and $\mu_r$ is the renormalization scale. In order to remove the UV
divergences in $\mathcal{M}_V$, a renormalization procedure must be carried out. We
define the renormalization constants as
\begin{align}
  \lambda'_0 &= Z_\lambda \lambda' \mu_r^\epsilon= (1 + \delta Z_\lambda) \lambda'
  \mu_r^\epsilon, \\
  \psi_0 &= Z_{\psi{L}}^{1/2} \psi_L + Z_{\psi{R}}^{1/2} \psi_R \notag \\
  &= \left( 1 + \frac{1}{2} \delta Z_{\psi{L}} \right) \psi_L + \left( 1 + \frac{1}{2}
    \delta Z_{\psi{R}} \right) \psi_R,
\end{align}
where $\lambda'_0$ and $\psi_0$ are the bare coupling and the bare quark wave function,
respectively. In the $\overline{\text{MS}}$ scheme, these renormalization constants are
fixed to be
\begin{align}
  \delta Z_{\psi{L}} &= \delta Z_{\psi{R}} = - \frac{\alpha_s}{4\pi} C_F (4\pi)^\epsilon
  \Gamma(1+\epsilon) \frac{1}{\epsilon} , \\
  \delta Z_\lambda &= - \frac{\alpha_s}{4\pi} C_F (4\pi)^\epsilon \Gamma(1+\epsilon)
  \frac{3}{\epsilon}.
\end{align}
Thus the running of the coupling constant is governed by
\begin{equation}
  \lambda'(\mu) = \frac{\lambda'(\mu_0)}{1 + \displaystyle{\frac{3\alpha_s}{4\pi} C_F
      \log{\frac{\mu^2}{\mu_0^2}}}}.
\end{equation}

After adding the counter term, the UV divergences in $\mathcal{M}_V$ are cancelled, but
the IR divergent terms still persist. The corresponding differential cross section is
\begin{equation}
  \frac{\mathrm{d}\sigma_V}{\mathrm{d}{q_T^2}\mathrm{d}{y}} = \frac{\mathrm{d}\sigma_B}{\mathrm{d}{q_T^2}\mathrm{d}{y}}
  \frac{\alpha_s}{\pi} C_F (4\pi)^\epsilon \Gamma(1+\epsilon) \left[
    -\frac{1}{\epsilon^2} - \frac{1}{\epsilon} \left( \frac{3}{2} +
      \ln\frac{\mu_r^2}{m^2} \right) - \frac{1}{2} \ln^2\frac{\mu_r^2}{m^2} +
    \frac{2\pi^2}{3} - 1 \right].
\end{equation}

\subsection{Real gluon emission}

We now consider the contribution from the emission of one gluon $\alpha(\hat{p}_1) +
\beta(\hat{p}_2) \to L(q) + g(k)$. We define the Mandelstam variables as
\begin{align}
  s &= (p_1+p_2)^2, \notag
  \\
  t &= (p_1-q)^2 = m^2 - p_1^+q^- = m^2 - \sqrt{s(q_T^2+m^2)}e^{-y}, \notag
  \\
  u &= (p_2-q)^2 = m^2 - p_2^-q^+ = m^2 - \sqrt{s(q_T^2+m^2)}e^y, \notag
  \\
  \hat{s} &= (\hat{p}_1+\hat{p}_2)^2 = x_1x_2s, \notag
  \\
  \hat{t} &= (\hat{p}_1-q)^2 = x_1(t-m^2)+m^2, \notag
  \\
  \hat{u} &= (\hat{p}_2-q)^2 = x_2(u-m^2)+m^2.
\end{align}
The squared matrix element (with spin and color summed and averaged) can be expressed as
\begin{align}
  \overline{\modsq{\mathcal{M}_R}} &= \frac{8}{9} \pi\alpha_s \lambsq\mu_r^{2\epsilon}
  \frac{(1-\epsilon)(\hat{s}^2+m^4)+2\epsilon\hat{s}m^2}{\hat{t}\hat{u}} \notag
  \\
  &= \frac{8}{9} \pi\alpha_s \lambsq\mu_r^{2\epsilon} x_1x_2s \frac{1}{q_T^2} \left\{
    (1-\epsilon) \left[ 1 + \left(\frac{\tau}{x_1x_2}\right)^2 \right] + 2\epsilon
    \frac{\tau}{x_1x_2} \right\}.
\end{align}
The two particle phase space in $d$ dimensions is
\begin{align}
  \mathrm{d}\Phi_2 &= \frac{\mathrm{d}^{d-1}q}{(2\pi)^{d-1}2q_0}
  \frac{\mathrm{d}^{d-1}k}{(2\pi)^{d-1}2k_0} (2\pi)^d \delta^d(\hat{p}_1+\hat{p}_2-q-k) \notag
  \\
  &= \frac{1}{2(2\pi)^{d-2}} \mathrm{d}^{d-2}\vec{q}_T \mathrm{d}{y} \,
  \delta(\hat{s}+\hat{t}+\hat{u}-m^2) \notag
  \\
  &= \frac{1}{8\pi} \frac{1}{\Gamma(1-\epsilon)} \left(\frac{4\pi}{q_T^2}\right)^\epsilon
  \mathrm{d}{q_T^2} \mathrm{d}{y} \, \delta(\hat{s}+\hat{t}+\hat{u}-m^2).
\end{align}
Thus the differential cross section can be written as
\begin{align}
  \frac{\mathrm{d}\sigma_R}{\mathrm{d}{q_T^2}\mathrm{d}{y}} &= \int \mathrm{d}{x_1} \mathrm{d}{x_2} F(x_1,x_2)
  \delta(x_1x_2s+x_1(t-m^2)+x_2(u-m^2)+m^2) \notag
  \\
  &= \frac{1}{s} \int_{x_1^-}^1 \frac{\mathrm{d}{x_1}}{x_1-x_1^+} F(x_1,x_2^*),
\end{align}
where
\begin{align}
  x_1^- &= \frac{x_1^+-\tau}{1-x_2^+}, \qquad x_2^*=\frac{x_1x_2^+-\tau}{x_1-x_1^+},
  \notag \\
  x_1^+ &= e^{y}\sqrt{\tau+q_T^2/s}, \qquad x_2^+=e^{-y}\sqrt{\tau+q_T^2/s},
\end{align}
and
\begin{align}
  F(x_1,x_2) &= \frac{\alpha_s}{18} \lambda'^2 \frac{1}{\Gamma(1-\epsilon)}
  \left(\frac{4\pi\mu_r^2}{q_T^2}\right)^\epsilon f_{\alpha/A}(x_1,\mu_f)
  f_{\beta/B}(x_2,\mu_f)
  \notag \\
  &\qquad \times \frac{1}{q_T^2} \left\{ (1-\epsilon) \left[ 1 +
      \left(\frac{\tau}{x_1x_2}\right)^2 \right] + 2\epsilon \frac{\tau}{x_1x_2}
  \right\}.
\end{align}

\subsection{Gluon splitting subprocesses}

In addition to the real gluon emission subprocess, there are also contributions from the
gluon initiated processes $\alpha(\hat{p}_1) + g(\hat{p}_2) \to L(q) + \bar{\beta}(k)$
and $g(\hat{p}_1) + \beta(\hat{p}_2) \to L(q) + \bar{\alpha}(k)$. Defining the Mandelstam
variables as before, for the first subprocesses we can write the the squared matrix
elements as
\begin{align}
  \overline{\modsq{\mathcal{M}^{qg}_G}} &= \frac{1}{3} \pi\alpha_s \lambsq\mu_r^{2\epsilon}
  \frac{(1-\epsilon)(\hat{u}^2+m^4)+2\epsilon\hat{u}m^2}{-(1-\epsilon)\hat{s}\hat{t}}
  \notag \\
  &= \frac{1}{3} \pi\alpha_s \lambsq\mu_r^{2\epsilon} x_1x_2s \frac{1}{q_T^2} \left\{
    \frac{(x_2x_1^+-\tau)[(x_2x_1^+-\tau)^2+\tau^2]}{(x_1x_2)^3} -
    \frac{2\epsilon}{1-\epsilon} \frac{(x_2x_1^+-\tau)^2\tau}{(x_1x_2)^3} \right\},
\end{align}
while the squared matrix elements for the second subprocess can be obtained from the
above one by the substitution $\hat{t} \leftrightarrow \hat{u}$, $x_1 \leftrightarrow
x_2$, $x_1^+ \leftrightarrow x_2^+$, namely
\begin{align}
  \overline{\modsq{\mathcal{M}^{gq}_G}} &= \frac{1}{3} \pi\alpha_s \lambsq\mu_r^{2\epsilon}
  \frac{(1-\epsilon)(\hat{t}^2+m^4)+2\epsilon\hat{t}m^2}{-(1-\epsilon)\hat{s}\hat{u}}
  \notag \\
  &= \frac{1}{3} \pi\alpha_s \lambsq\mu_r^{2\epsilon} x_1x_2s \frac{1}{q_T^2} \left\{
    \frac{(x_1x_2^+-\tau)[(x_1x_2^+-\tau)^2+\tau^2]}{(x_1x_2)^3} -
    \frac{2\epsilon}{1-\epsilon} \frac{(x_1x_2^+-\tau)^2\tau}{(x_1x_2)^3} \right\}.
\end{align}
Thus the differential cross section is
\begin{align}
  \frac{\mathrm{d}\sigma_G}{\mathrm{d}{q_T^2}\mathrm{d}{y}} &= \int \mathrm{d}{x_1} \mathrm{d}{x_2} F'(x_1,x_2)
  \delta(x_1x_2s+x_1(t-m^2)+x_2(u-m^2)+m^2) \notag \\
  &= \frac{1}{s} \int_{x_1^-}^1 \frac{\mathrm{d}{x_1}}{x_1-x_1^+} F'(x_1,x_2^*),
\end{align}
where
\begin{align}
  F'(x_1,x_2) &= \frac{1}{16\pi} \frac{1}{x_1x_2s} \frac{1}{\Gamma(1-\epsilon)}
  \left(\frac{4\pi}{q_T^2}\right)^\epsilon
  \notag \\
  &\qquad \times \left[ f_{\alpha/A}(x_1,\mu_f) f_{g/B}(x_2,\mu_f)
    \overline{\modsq{\mathcal{M}^{qg}_G}} + f_{g/A}(x_1,\mu_f) f_{\beta/B}(x_2,\mu_f)
    \overline{\modsq{\mathcal{M}^{gq}_G}} \right].
\end{align}

\subsection{Splitting function contributions}

The contributions from splitting functions are essential to cancel the collinear
divergences in the cross sections. They arise from the renormalization of the PDFs at
NLO.  In the $\overline{\text{MS}}$ scheme, the renormalized PDFs can be expressed as
\begin{equation}\label{eq:pdf}
  f_{\alpha/H}(x,\mu_f) = f_{\alpha/H}(x) + \sum_{\beta} \left( -\frac{1}{\epsilon}
  \right) \frac{\alpha_s}{2\pi} \Gamma(1+\epsilon)
  \left(\frac{4\pi\mu_r^2}{\mu_f^2}\right)^\epsilon \int_x^1 \frac{\mathrm{d}{z}}{z}
  P_{\alpha\beta}(z) f_{\beta/H}(x/z),
\end{equation}
where $P_{\alpha\beta}(z)$ are the A-P splitting functions, which are given by
\begin{align}
  P_{qq}(z) &= P_{\bar{q}\bar{q}}(z) = C_F \left[ \frac{3}{2}\delta(1-z) +
    \frac{1+z^2}{(1-z)_+} \right], \\
  P_{qg}(z) &= P_{\bar{q}g}(z) = \frac{1}{2} (z^2 + (1-z)^2).
\end{align}

The resulting contributions to the differential cross section are
\begin{align}
  \frac{\mathrm{d}\sigma_C}{\mathrm{d}{q_T^2}\mathrm{d}{y}} &= \frac{\pi}{12s} \lambda'^2 \delta(q_T^2)
  \frac{1}{\epsilon} \frac{\alpha_s}{2\pi} \Gamma(1+\epsilon)
  \left(\frac{4\pi\mu_r^2}{\mu_f^2}\right)^\epsilon
  \notag \\
  &\qquad \times \left[ (P\circ{f})_{\alpha/A}(x_1^0,\mu_f) f_{\beta/B}(x_2^0,\mu_f) +
    f_{\alpha/A}(x_1^0,\mu_f) (P\circ{f})_{\beta/B}(x_2^0,\mu_f) \right],
\end{align}
where
\begin{equation}
  (P\circ{f})_{\alpha/H}(x,\mu_f) = \sum_{\gamma} \int_{x}^1 \frac{\mathrm{d}{z}}{z}
    P_{\alpha\gamma}(z) f_{\gamma/H}(x/z,\mu_f).
\end{equation}

\section{Total cross sections}\label{sec:total}

The total cross sections can be obtained by integrating out $q_T$ and $y$ from the
differential cross sections given above. The leading order result is
\begin{equation}
  \sigma_{\text{LO}} = \frac{\pi}{12s} \lambda'^2 \int_{\tau}^1 \frac{\mathrm{d} x}{x}
  f_{\alpha/A}(x,\mu_f) f_{\beta/B}(\tau/x,\mu_f).
\end{equation}
The next-to-leading order result can be written as
\begin{align}
  \sigma_{\text{NLO}} &= \int \mathrm{d}{x_1} \mathrm{d}{x_2} \biggl[ \hat{\sigma}^{\alpha\beta}
    f_{\alpha/A}(x_1,\mu_f) f_{\beta/B}(x_2,\mu_f) \biggr. \notag
  \\
  &\qquad + \biggl. \hat{\sigma}^{\alpha{g}} f_{\alpha/A}(x_1,\mu_f) f_{g/B}(x_2,\mu_f) +
    \hat{\sigma}^{g\beta} f_{g/A}(x_1,\mu_f) f_{\beta/B}(x_2,\mu_f) \biggr],
\end{align}
where
\begin{align}
  \hat{\sigma}^{\alpha\beta} &= \frac{\alpha_s}{9\hat{s}} \lambda'^2 \left\{ \left(
      \frac{3}{2}\ln\frac{\mu_r^2}{\mu_f^2} + \frac{\pi^2}{3} - 1 \right) \delta(1-z) +
    \ln\frac{m^2}{\mu_f^2}\frac{1+z^2}{(1-z)_+} \right.
  \notag \\
  &\quad + \left. 2(1+z^2)\left(\frac{\ln(1-z)}{1-z}\right)_+ - (1+z^2)\frac{\ln{z}}{1-z}
    + (1-z) \right\},
  \\
  \hat{\sigma}^{\alpha{g}} &= \hat{\sigma}^{g\beta} = \frac{\alpha_s}{48\hat{s}}
  \lambda'^2 \left[ \left( \ln\frac{m^2}{\mu_f^2} + \ln\frac{(1-z)^2}{z} \right)
    (z^2+(1-z)^2) + \frac{1}{2}(1-z)(7z-3) \right].
\end{align}
Here $\displaystyle{z \equiv \frac{m^2}{\hat{s}} = \frac{\tau}{x_1x_2}}$, and the
function with a subscript ``$+$'' is a distribution, which is defined as
\begin{equation}
  \int_0^1 \mathrm{d} z g(z) f(z)_+ = \int_0^1 \mathrm{d} z (g(z)-g(1)) f(z)
\end{equation}
for an arbitrary function $g(z)$. Our expressions for the total cross sections are the
same as those obtained in Ref.~\cite{Nucl.Phys.B660.343}.

In the numerical evaluation of the total cross sections, we use the updated version of
the CTEQ and MRST PDF, namely CTEQ6.1 and MRST2004 (there is no update for GRV98 PDF).
The renormalization and factorization scale are taken to the mass of the final state
slepton, $\mu_r=\mu_f=m$, unless otherwise specified. We will set the initial quarks to
only the light flavours $u$, $d$ and $s$. Due to the severe constraints on the products
of two $\lambda'$s, we will consider the contributions from one single $\lambda'_{ijk}$
at a time. The most stringent constraints on the couplings relevant here come from the
rare semileptonic decay $K \to \pi \nu \bar{\nu}$, which gives $\lambda'_{ijk} \leq
0.012m_{\tilde{d}_k}/(100\text{GeV})$ for $k=1,2$. We can assume that the first two
generations of sfermions have nearly degenerate masses, so we can take the down squark
mass as the slepton mass approximately. In the following, unless otherwise specified, we
will take the tree level coupling $\lambda'_{ijk}=0.01$, which can satisfy the
constraints for all the slepton masses under consideration. The cross sections for other
values of $\lambda'$ can be obtained easily by a multiplicative factor.

For convenience, we define three cross sections as following:
\begin{align}
  \sigma_{\mathrm{LO1}}: &\quad \text{LO partonic cross section convoluted with LO PDFs};
  \notag \\
  \sigma_{\mathrm{LO2}}: &\quad \text{LO partonic cross section convoluted with NLO
    ($\overline{\text{MS}}$) PDFs}; \notag
  \\
  \sigma_{\mathrm{NLO}}: &\quad \text{NLO partonic cross section convoluted with NLO
    ($\overline{\text{MS}}$) PDFs}, \notag
\end{align}
and correspondingly two $K$ factors:
\begin{equation*}
  K_1 = \frac{\sigma_{\mathrm{NLO}}}{\sigma_{\mathrm{LO1}}}, \qquad
  K_2 = \frac{\sigma_{\mathrm{NLO}}}{\sigma_{\mathrm{LO2}}}.
\end{equation*}
As the above definitions, $K_2$ measures only the size of the NLO QCD corrections to the
cross sections, while $K_1$ accounts for the effects of changing parton distribution
functions additionally.

\subsection{Sneutrino production}

We will consider sneutrino production first. The possible partonic initial states are
$d\bar{d}$, $d\bar{s}$, $s\bar{d}$ and $s\bar{s}$.

Fig.~\ref{fig:cs_sn_tvt} shows the cross sections for sneutrino production at the
Tevatron as functions of the sneutrino mass. The left and right graphs correspond to
CTEQ6.1 and MRST2004 PDFs, respectively. The solid, dashed and dotted curves represents
to $\sigma_{\text{NLO}}$, $\sigma_{\text{LO1}}$ and $\sigma_{\text{LO2}}$, respectively.
For $p\bar{p}$ collision, since we take the $\lambda'$s to be equal, the cross sections
from $s\bar{d}$ initial states are obviously equal to those from $d\bar{s}$ initial
states. We find that the NLO QCD corrections generally enhance the total cross sections.
The cross sections decrease monotonically with the increasing of the sneutrino mass. From
Fig.~\ref{fig:cs_sn_tvt}, one can see that, for a sneutrino of mass $m=200$~GeV, if we
take $\lambda'=0.02$, the leading order (LO1) and the next-leading-order cross sections
from $d\bar{d}$ channel are 274~fb and 400~fb, respectively. The cross sections from
$d\bar{s}$ channel are 58~fb and 83~fb, while the ones from $s\bar{s}$ channel are 11~fb
and 16~fb, respectively.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_cs_sn_tvt_cteq.eps}
  \includegraphics{fig_cs_sn_tvt_mrst.eps}
  \caption{\label{fig:cs_sn_tvt}The cross sections for sneutrino production from various
    initial states at the Tevatron. The cross sections from $s\bar{d}$ initial states is
    obviously equal to those from $d\bar{s}$ initial states for $p\bar{p}$ collision if
    the corresponding $\lambda'$s are equal.}
\end{figure}
The cross sections for the LHC case are shown in Fig.~\ref{fig:cs_sn_lhc}. For $pp$
collider, the cross sections from $d\bar{s}$ and $s\bar{d}$ initial states are no longer
equal even with equal couplings. For a 200~GeV sneutrino and $\lambda'=0.02$, the cross
sections from $d\bar{d}$ channel can reach 3.17~pb (LO1) and 4.2~pb (NLO), respectively.
The cross sections from other channels are relatively smaller, but still remarkable as
the cases at the Tevatron. Our results are consistent with those from
Ref.~\cite{Nucl.Phys.B660.343}.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_cs_sn_lhc_cteq.eps}
  \includegraphics{fig_cs_sn_lhc_mrst.eps}
  \caption{\label{fig:cs_sn_lhc}The cross sections for sneutrino production at the LHC.
    For $pp$ collision $d\bar{s}$ initiated process has larger cross section than
    $s\bar{d}$ initiated one if the couplings are the same.}
\end{figure}

To quantify the enhancement of the total cross sections by the NLO QCD corrections, we
show the $K$ factors in the following. First, we plot $K_2$ as functions of the sneutrino
mass in Fig.~\ref{fig:k2_sn}. The curves are quite similar in spite of different PDF sets
and different initial states, which is just a reflection of the flavour blindness of QCD.
The solid and dashed curves correspond to CTEQ and MRST PDFs, respectively. For each PDF
set, the curves from top to bottom represents $d\bar{d}$, $d\bar{s}$, $s\bar{d}$ and
$s\bar{s}$ initiated processes, respectively, while for the Tevatron case $s\bar{d}$ is
omitted. The ordering of the magnitudes of the $K$ factors of different initial states is
expected, which is due to the different weights of the contributions from gluon initiated
subprocesses.  The corrections increase monotonically with the increasing of sneutrino
mass, and can reach 70 percent at Tevatron and 30 percent at LHC for a 1~TeV sneutrino,
respectively.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_k2_sn_tvt.eps}
  \includegraphics{fig_k2_sn_lhc.eps}
  \caption{\label{fig:k2_sn}$K_2$ for sneutrino production at the Tevatron (left graph)
    and at the LHC (right graph). The solid and dashed curves correspond to CTEQ and MRST
    PDFs, respectively. For each PDF set, the curves from top to bottom represents
    $d\bar{d}$, $d\bar{s}$, $s\bar{d}$ and $s\bar{s}$ initiated processes, respectively,
    while for the Tevatron case $s\bar{d}$ is omitted.}
\end{figure}

The case of $K_1$ is a bit more complicated due to the different order of PDFs involved.
In Fig.~\ref{fig:k1_sn_dd} we plot $K_1$ for $d\bar{d}$ initial states as functions of
the sneutrino mass. We find that there is still certain discrepancy between the results
of CTEQ and MRST parton distributions, especially at large $m_{\tilde{\nu}}$ region. This
is mainly due to the difference of the leading order results at region of large momentum
fraction, while the next-to-leading order results of the two PDF sets are quite close to
each other, as shown in Fig.~\ref{fig:cs_sn_tvt}. This confirm the necessity of
calculating the NLO corrections.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_k1_sn_dd_tvt.eps}
  \includegraphics{fig_k1_sn_dd_lhc.eps}
  \caption{\label{fig:k1_sn_dd}$K_1$ for sneutrino production from $d\bar{d}$ initial
    states at the Tevatron (left graph) and at the LHC (right graph).}
\end{figure}
For the subprocesses involving strange quark, we only plot $K_1$ for $s\bar{s}$ initial
states. From Fig.~5 in Ref.~\cite{Nucl.Phys.B660.343}, one can see that there was large
discrepancy between the results of CTEQ5 and MRST98 PDF sets. With the updated PDFs, we
find that the discrepancy has been significantly reduced. As shown in
Fig.~\ref{fig:k1_sn_ss}, the two curves agree each other quite well, and are more close
to the CTEQ5 results given in Ref.~\cite{Nucl.Phys.B660.343}.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_k1_sn_ss_tvt.eps}
  \includegraphics{fig_k1_sn_ss_lhc.eps}
  \caption{\label{fig:k1_sn_ss}$K_1$ for sneutrino production from $s\bar{s}$ initial
    states at the Tevatron (left graph) and at the LHC (right graph).}
\end{figure}

We now investigate the dependence of the cross sections on the renormalization and
factorization scales. We will choose the renormalization $\mu_r$ and the factorization
scale $\mu_f$ to be equal, $\mu_r=\mu_f=\kappa\mu_0$, where $\mu_0=m_{\tilde{\nu}}$ is
the mass of the sneutrino. In Fig.~\ref{fig:sc_sn} we plot the ratios of the cross
sections $R=\sigma(\kappa)/\sigma(1)$ as functions of $\kappa$ for
$m_{\tilde{\nu}}=200$~GeV. We only use CTEQ PDFs, since the parametrization of the parton
distribution is irrelevant for the main conclusion here. We show here the results of
$d\bar{d}$ initial states, and the results of other initial states are similar. From the
figure one can see that the dependence on the scales is significantly reduced from LO to
NLO, as we expected.
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_sc_sn_tvt.eps}
  \includegraphics{fig_sc_sn_lhc.eps}
  \caption{\label{fig:sc_sn}The renormalization and factorization scale dependence of the
    leading order and next-to-leading order cross sections at Tevatron (left graph) and
    at LHC (right graph).}
\end{figure}

\subsection{Charged slepton production}

We now turn to the production of charged sleptons. The possible initial states now become
$u\bar{d}$ and $u\bar{s}$ for sleptons with positive charge, $d\bar{u}$ and $s\bar{u}$
for ones with negative charge, respectively. For simplicity, we will only consider
contributions from $u\bar{d}$ and $d\bar{u}$ initial states, and only use the CTEQ6.1
PDF. The situation is much similar to the production of sneutrinos, so we do not discuss
any details here and just show the cross sections in Fig.~\ref{fig:cs_sl} and the $K$
factors in Fig.~\ref{fig:k1_sl}, respectively.

\begin{figure}[ht!]
  \centering
  \includegraphics{fig_cs_sl_tvt_cteq.eps}
  \includegraphics{fig_cs_sl_lhc_cteq.eps}
  \caption{\label{fig:cs_sl}The cross sections for charged slepton production at the
    Tevatron (left) and the LHC (right).}
\end{figure}
\begin{figure}[ht!]
  \centering
  \includegraphics{fig_k1_sl_tvt.eps}
  \includegraphics{fig_k1_sl_lhc.eps}
  \caption{\label{fig:k1_sl}The $K$ factor ($K_1$) for charged slepton production at the
    Tevatron (left) and the LHC (right).}
\end{figure}

\section{Transverse momentum distribution}\label{sec:qt}

In this section we investigate the transverse momentum distribution of the slepton. At
Born level the slepton is kept at zero $q_T$ due to momentum conservation and the
distribution is proportional to $\delta^2(\vec{q}_T)$. Thus the leading order
distribution at non-zero $q_T$ belongs to $\mathcal{O}(\alpha_s)$, where momentum
conservation is retained by the additional parton emitted. The distribution can be
obtained by integrate out $y$ from the differential cross section given in
Section~\ref{sec:nlo}. However, this fixed order result is only valid when $q_T$ is not
too small compared with the mass of the slepton $m$. If $q_T \ll m$, the corresponding
parton emitted would be either soft or collinear to one of the initial partons. In
consequence, large logarithms like $\ln(m^2/q_T^2)$ will appear and will dominate the
cross section for sufficiently small $q_T$. In general, there should be double logarithms
for each gluon attached to the initial quarks due to the overlap of soft region and
collinear region. As a result, the perturbative expansion would be controlled by
$\alpha_s\ln^2(m^2/q_T^2)$ rather than $\alpha_s$. The convergence of the perturbation
series will be spoiled if $\alpha_s\ln^2(m^2/q_T^2)$ approaches unity.

The problem arising at small $q_T$ can also be seen from the fact that the fixed order
cross section is singular as $q_T \to 0$. For later use, we define the asymptotic part of
the differential cross section at small $q_T$ to be the terms which are at least as
singular as $1/q_T^2$ when $q_T \to 0$. At $\mathcal{O}(\alpha_s)$, the asymptotic
expression can be isolated from the expressions obtained in section~\ref{sec:nlo}:
\begin{align}
  \label{eq:asym}
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}}(\text{asym}) &= \frac{1}{2} \sigma_0
  \frac{\alpha_s}{\pi} \frac{1}{q_T^2} \biggl\{ f_{\alpha/A}(x_1^0,\mu_f)
    f_{\beta/B}(x_2^0,\mu_f) \left( 2C_F \ln\frac{m^2}{q_T^2} - 3C_F \right) \biggr.
  \notag \\
  &\qquad + \biggl. (P\circ{f})_{\alpha/A}(x_1^0,\mu_f) f_{\beta/B}(x_2^0,\mu_f) +
      f_{\alpha/A}(x_1^0,\mu_f) (P\circ{f})_{\beta/B}(x_2^0,\mu_f) \biggr\},
\end{align}
where $\sigma_0=\displaystyle{\frac{\pi}{12s}}\lambda'^2$.

\subsection{Resummation of large logarithms}

In order to make use of the perturbation theory with the existence of large logarithms at
each order, one must reorganize the perturbative expansion to resum the large terms. It
was first shown by Dokshitzer, Diakonov and Troyan (DDT) \cite{Phys.Rep.58.269} that in
the double leading logarithm approximation (DLLA), terms like
$\alpha_s^n\ln^{2n-1}(m^2/q_T^2)/q_T^2$ can be resummed into a Sudakov form factor.
However, this result relies on the assumption that the emitted gluons are both soft and
collinear and their transverse momenta are strongly ordered.  With the over-constrained
phase space, the resulting distribution is over-suppressed at small $q_T$. This implies
that the subleading logarithms are also important and need to be resummed too. The
subleading logarithms correspond to the phase space configurations in which some of the
emitted gluons are not so soft or collinear. In this case, the transverse momentum
conservation must be imposed, which is implemented in the $b$-space formalism introduced
by Parisi and Petronzio \cite{Nucl.Phys.B154.427}. Collins and Soper \cite{colsop}
improved the $b$-space formalism to resum all the terms like $\alpha_s^nL^r$
($r=0,...,2n-1$) based on the renormalization group equation (RGE) method, where $L$
represents the large logarithms. In this framework, Collins, Soper and Sterman (CSS)
\cite{Nucl.Phys.B250.199} derived a resummation formula for the transverse momentum
distributions of the vector bosons produced in Drell-Yan processes. This formalism, often
refered to as the CSS formalism, has also been applied to many other processes.

In the CSS formalism, the differential cross section we are considering can be written as
\begin{equation}
  \label{eq:total}
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} = \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}}
  (\text{resum}) + Y(q_T,m,x_1^0,x_2^0),
\end{equation}
where the resummed part can be expressed as an inverse Fourier transformation
\begin{align}
  \label{eq:resum}
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{resum}) &= \sum_{\alpha,\beta}
  \frac{1}{2} \sigma_0 \frac{1}{2\pi} \int \mathrm{d}^2\vec{b} \exp \left( i\vec{b} \cdot
    \vec{q}_T \right) W_{\alpha\beta}(b,m,x_1^0,x_2^0)
  \notag \\
  &= \sum_{\alpha,\beta} \frac{1}{2} \sigma_0 \int_0^\infty b \mathrm{d}{b} J_0(b q_T)
  W_{\alpha\beta}(b,m,x_1^0,x_2^0),
\end{align}
where $\vec{b}$ is the impact parameter conjugating to $\vec{q}_T$, $J_0$ is zero order
Bessel function of the first kind, and
\begin{align}
  W_{\alpha\beta}(b,m,x_1^0,x_2^0) &= \tilde{f}_{\alpha/A}(x_1^0,C_3/b)
  \tilde{f}_{\beta/B}(x_2^0,C_3/b) \notag
  \\
  &\qquad \times \exp \left\{ - \int_{C_1^2/b^2}^{C_2^2m^2}
    \frac{\mathrm{d}\bar{\mu}^2}{\bar{\mu}^2} \left[ \ln\frac{C_2^2m^2}{\bar{\mu}^2}
      A(\alpha_s(\bar{\mu})) + B(\alpha_s(\bar{\mu})) \right] \right\}.
\end{align}
Here $C_i (i=1,2,3)$ are constants of order 1 which are by convention
\cite{Nucl.Phys.B250.199} chosen to be
\begin{equation}
  C_1 = C_3 = 2 e^{-\gamma_E} \equiv b_0, \, C_2 = 1,
\end{equation}
and $\tilde{f}$ is the convolution of the PDFs and the coefficient functions $C$
\begin{equation}
  \tilde{f}_{\alpha/h}(x,\mu) = \sum_{\gamma} \int_x^1 \frac{\mathrm{d}{z}}{z}
  C_{\alpha\gamma}(z,\alpha_s(\mu)) f_{\gamma/h}(x,\mu),
\end{equation}
and the coefficients $A$, $B$ and $C$ can be expanded to series in $\alpha_s$
\begin{align}
  A(\alpha_s) &= \sum_{n=1}^\infty A^{(n)} \left( \frac{\alpha_s}{\pi} \right)^n,
  \\
  B(\alpha_s) &= \sum_{n=1}^\infty B^{(n)} \left( \frac{\alpha_s}{\pi} \right)^n,
  \\
  C_{\alpha\beta}(z,\alpha_s) &= \sum_{n=0}^\infty C_{\alpha\beta}^{(n)}(z) \left(
    \frac{\alpha_s}{\pi} \right)^n,
\end{align}
and they can be calculated order by order in perturbative theory. The lowest order
coefficients can be extracted from the asymptotic expression above
\begin{align}
  A^{(1)} &= C_F = \frac{4}{3} , \qquad B^{(1)} = - \frac{3}{2} C_F = -2 ,
  \\
  C_{\alpha\beta}^{(0)}(z) &= \delta_{\alpha\beta} \delta(1-z).
\end{align}
With these coefficients, we can actually sum up all terms like $\alpha_s^nL^{2n-1}$ and
$\alpha_s^nL^{2n-2}$.

The another term in Eq.~(\ref{eq:total}), the $Y$ term, is the remaining contributions
which are not resummed. Since it contains no large logarithms, it can be reliably
calculated in perturbation theory. In fact, according to the definition of the asymptotic
part mentioned above, one can immediately see that
\begin{equation}
  Y = \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{pert}) -
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{asym}).
\end{equation}
However, the resummed part is still not able to be calculated perturbatively. The reason
is that in Eq.~(\ref{eq:resum}), the integral over the impact parameter $b$ extends to
infinity, while the integrand involves the strong coupling constant $\alpha_s$ and the
PDFs at scale $b_0/b$, where they are not well defined if $b$ is large enough so that
$b_0/b$ enters non-perturbative region.

Many prescriptions have been developed regarding this problem, and we will show two
approaches here. Collins, Soper and Sterman, in their original paper
\cite{Nucl.Phys.B250.199}, suggested that one can use a cut-off $b_{\text{max}}$ and
regard the effects from $b>b_{\text{max}}$ as non-perturbative input. Practically, they
replacing $W(b)$ in Eq.~(\ref{eq:resum}) by
\begin{equation}
  \widetilde{W}(b) = W(b_*) F_{\text{NP}}(b),
\end{equation}
where
\begin{equation}
  b_* = \frac{b}{\sqrt{1+(b/b_{\text{max}})^2}},
\end{equation}
and $F_{\text{NP}}(b)$ parameterizes the non-perturbative effects. Since $b_*$ never
exceeds $b_{\text{max}}$, $W(b_*)$ can be calculated perturbatively, and the theoretical
uncertainty mainly relies on the function $F_{\text{NP}}$. Recently, Landry, Brock,
Nadolsky and Yuan (BLNY) \cite{Phys.Rev.D67.073016} proposed the form
\begin{equation}
  F_{\text{NP}} = \exp \left\{ - b^2 \left[ g_1 + g_2 \ln\frac{m}{2Q_0} +
      g_1g_3\ln(100x_1^0x_2^0) \right] \right\}.
\end{equation}
They take $b_{\text{max}} = 0.5 \text{GeV}^{-1}$, $Q_0 = 1.6 \text{GeV}$ and the
parameters $g_i (i=1,2,3)$ are fitted to the available Drell-Yan data, which are given by
\begin{equation}
  g_1 = 0.21, \qquad g_2 = 0.68, \qquad g_3 = -0.60.
\end{equation}

One of the largest disadvantages of the $b_*$ prescription is that it alters the $W$
function in the perturbative region $b<b_{\text{max}}$. Regarding this, Qiu and Zhang
(QZ) \cite{Phys.Rev.D63.114011} proposed another prescription so that $W(b)$ is kept
unchanged for $b<b_{\text{max}}$.  Namely, they chose
\begin{equation}
  \widetilde{W}(b) =
  \begin{cases}
    W(b) & b \leq b_\text{max},
    \\
    W(b_\text{max}) F_{\text{NP}}(b) & b > b_\text{max},
  \end{cases}
\end{equation}
where $F_{\text{NP}}$ takes the form
\begin{equation}
  F_{\text{NP}}(b) = \exp \left\{ - \ln\frac{m^2b_{\text{max}}^2}{b_0^2} \left[ g_1
      \left( (b^2)^\alpha - (b_\text{max}^2)^\alpha \right) + g_2 ( b^2 -
      b_{\text{max}}^2 ) \right] - \bar{g}_2 ( b^2 - b_{\text{max}}^2 ) \right\}.
\end{equation}
The parameters $g_1$ and $\alpha$ are fixed by the continuity of the first and second
derivative of $\widetilde{W}$ at $b=b_\text{max}$, while $g_2$ and $\bar{g}_2$ are
determined from experiments. In the numerical evaluation, we will use both above methods
and compare their results.

\subsection{Numerical results}

In the numerical evaluation of the transverse momentum distribution, we take the
renomalization and factorization scale for the fixed order expressions to be
$\mu_r=\mu_f=\sqrt{m^2+q_T^2}/2$. For simplicity, we only show the results for $d\bar{d}$
initial states as an example. The results for other initial states are similar. We use
the CTEQ PDFs throughout this section.

According to the previous analysis, the differential cross section with respect to
$q_T^2$ and $y$ can be formally written as
\begin{equation} \label{eq:total2}
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{total}) =
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{resum}) +
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{pert}) -
  \frac{\mathrm{d}\sigma}{\mathrm{d}{q_T^2}\mathrm{d}{y}} (\text{asym}).
\end{equation}
At small $q_T$, the asymptotic part and the perturbative part cancel each other, and the
resummed part dominates the distribution. At large $q_T$, the difference between the
resummed part and the asymptotic part belongs to higher orders in $\alpha_s$, so the
perturbative predictions are recovered. Since the perturbative part and the asymptotic
part can be reliably calculated within perturbation theory, the only ambiguity comes from
the resummed part due to the non-perturbative issue. So we shall compare the results of
the different approaches to the non-perturbative parametrization for the reliable
predictions.

With the two $b$-space prescriptions at hand (BLNY and QZ), we first compare the
integrand of the Bessel transformation $b\widetilde{W}(b)$. We plot this function for a
sneutrino with mass $m=200$~GeV and rapidity $y=0$ in Fig.~\ref{fig:bw}. The solid curves
represent the BLNY results, while the dashed and the dotted curves correspond to the the
QZ prescription with two choices of $g_2$: $g_2=0$ (no power corrections) and
$g_2\log(m^2b_{\text{max}}^2/b_0^2)=0.8\text{GeV}^2$ (fitted power corrections),
respectively. The parameter $\bar{g}_2$ is always taken to be zero.
\begin{figure}[ht!]
\centering
\includegraphics{fig_bw_tvt.eps}
\includegraphics{fig_bw_lhc.eps}
\caption{\label{fig:bw}Integrand of the $b$-integral (without the Bessel function) as a
  function of $b$ for $m=200$~GeV and $y=0$ at the Tevatron (left) and the LHC (right).}
\end{figure}
From Fig.~\ref{fig:bw}, we can see that at the Tevatron, the BLNY parametrization notably
changes the shape of the function for $b<b_{\text{max}}$, and shows a sharper decrease
than the one of QZ. As a result, the resummed differential cross sections for the two
approaches will differ at small $q_T$ (at larger $q_T$ the impact of large $b$ region
gets smaller due to the Bessel function). On the other hand, the QZ parametrization
itself is insensitive to the value of $g_2$. At the LHC, as shown in the right graph of
Fig.~\ref{fig:bw}, the difference is quite small, and the resummed cross sections are
expected to agree to each other.  Furthermore, the shape of the function is ``narrower''
at the LHC than the one at the Tevatron, i.e., the contributions from large $b$ region to
the integral at the LHC are smaller than the ones at the Tevatron. So we conclude that
the predictions at the LHC is more reliable than the ones at the Tevatron.
\begin{figure}[ht!]
\centering
\includegraphics{fig_qt_cmp_tvt.eps}
\includegraphics{fig_qt_cmp_lhc.eps}
\caption{\label{fig:qt_cmp}Comparison of the resummed differential cross sections for
  $m=200$~GeV and $y=0$ at the Tevatron (left) and the LHC (right).}
\end{figure}
In Fig.~\ref{fig:qt_cmp}, we plot the corresponding differential cross sections according
to the two approaches. As discussed above, the results are slightly different at Tevatron
and agree quite well at LHC. In the following calculations, we will adopt the QZ
prescription and take $g_2=0$.

\begin{figure}[ht!]
\centering
\includegraphics{fig_qt_tvt_y0_200.eps}
\includegraphics{fig_qt_lhc_y0_200.eps}
\caption{\label{fig:qt_y0_200}The distribution with respect to the transverse momentum
  and the rapidity of the sneutrino from $d\bar{d}$ channel for central rapidity $y=0$ at
  the Tevatron (left graph) and the LHC (right graph). The mass of the sneutrino is taken
  to be 200~GeV.}
\end{figure}
In Fig.~\ref{fig:qt_y0_200}, we plot the various parts of the differential cross section
in Eq.~(\ref{eq:total2}) for rapidity $y=0$ at the Tevatron and the LHC. The mass of the
sneutrino is taken to be 200~GeV. The solid, dashed, dotted and dot-dashed curves
correspond to the total result, the resummed part, the perturbative part and the
asymptotic part, respectively. Quantitatively, the perturbative and the asymptotic cross
sections agree very well at small transverse momentum. On the other hand, the resummed
and the asymptotic part are not cancelled completely at high $q_T$ due to the higher
order effects included in the resummed one, so that the total one and the perturbative
one will differ at large $q_T$. This can be considered as the theoretical uncertainties.
In principle, one can return to the perturbative result for $q_T>q_T^{\text{cut}}$, where
$q_T^{\text{cut}}$ is arbitrarily chosen in the intermediate $q_T$ region.  However, in
order to make the transition smooth, one must introduce some kinds of matching procedure
which could also lead to uncertainties. In our work, we will use the resummed cross
section from small $q_T$ to large $q_T$.

Having settled down the technical issues, we now turn to show the predictions for the
transverse momentum distributions of the slepton. For the $y$ integral, the kinematic
range should be
\begin{equation}
  |y| \leq \acosh \left( \frac{1+\tau}{2\sqrt{\tau+q_T^2/s}} \right).
\end{equation}
In Fig.~\ref{fig:qt} we plot the transverse momentum distribution of the sneutrino from
the $d\bar{d}$ channel at the Tevatron and the LHC separately. The mass of the sneutrino
is taken to be 200~GeV, 400~GeV, 600~GeV, respectively. The peaks of the distribution
appear at about 3~GeV at the Tevatron and about 5~GeV at the LHC. The differential cross
sections decrease sharply with the increase of $q_T$, which indicates that most events
will happen in the relatively low $q_T$ region, where the resummation effects are
essential. For example, about 80 percent of events lie in the $q_T<20$~GeV region at the
Tevatron, while at the LHC the range is $q_T<40$~GeV.  Therefore, the precise theoretical
predictions for the distribution in the small $q_T$ region are very important, which can
help the selection of the the experimental cuts for better background rejection.
\begin{figure}[ht!]
\centering
\includegraphics{fig_qt_tvt.eps}
\includegraphics{fig_qt_lhc.eps}
\caption{\label{fig:qt}The transverse momentum distribution of the sneutrino from
  $d\bar{d}$ channel at the Tevatron (left graph) and the LHC (right graph). The mass of
  the sneutrino is taken to be 200~GeV, 400~GeV, 600~GeV, as labeled in the figure.}
\end{figure}

\section{Summary}\label{sec:summary}

In summary, we have calculated the next-to-leading order total cross section and
transverse momentum distribution of a single slepton in the MSSM without R-parity,
including all-order soft gluon resummation effects. For the total cross section, our
results are consistent with the results of Ref.~\cite{Nucl.Phys.B660.343}. We update
their numerical results with the updated version of the parton distribution functions and
find that the discrepancy between the different sets of PDFs has been decreased compared
with the previous version.  Also, we find that the factorization and renormalization
scale dependece in next-to-leading order is much smaller than the leading-order results.
For the transverse momentum distribution, we resummed the large logarithms at small
transverse momentum. Combined with the fixed order calculations, we give consistent
predictions for both small $q_T$ and large $q_T$. We also compared two approaches to the
non-perturbative parametrization and found that the results are slightly different at the
Tevatron and are in good agreement at the LHC.  Our result can be useful to the
simulation of the events and to the future collider experiments.

\begin{acknowledgments}
  We would like to thank Jianwei Qiu for very helpful discussions. This work was
  supported in part by the National Natural Science Foundation of China, under grant
  Nos.~10421003 and 10575001, and the Key Grant Project of Chinese Ministry of Education,
  under grant NO.~305001.
\end{acknowledgments}

redpajama_set_name: RedPajamaArXiv


text:
Pedophiles call for same rights as Homosexuals
Posted by: noco2097 in Cool Stories December 1, 2013	0 1776 Views
Using the same tactics used by "gay" rights activists, pedophiles have begun to seek similar status arguing their desire for children is a sexual orientation no different than heterosexual or homosexuals.
Critics of the homosexual lifestyle have long claimed that once it became acceptable to identify homosexuality as simply an "alternative lifestyle" or sexual orientation, logically nothing would be off limits.
"Gay" advocates have taken offense at such a position insisting this would never happen. However, psychiatrists are now beginning to advocate redefining pedophilia in the same way homosexuality was redefined several years ago.
In 1973 the American Psychiatric Association declassified homosexuality from its list of mental disorders. A group of psychiatrists with B4U-Act recently held a symposium proposing a new definition of pedophilia in the Diagnostic and Statistical Manual of Mental Health Disorders of the APA.
B4U-Act calls pedophiles "minor-attracted people." The organization's website states its purpose is to, "help mental health professionals learn more about attraction to minors and to consider the effects of stereotyping, stigma and fear."
In 1998 The APA issued a report claiming "that the 'negative potential' of adult sex with children was 'overstated' and that 'the vast majority of both men and women reported no negative sexual effects from childhood sexual abuse experiences."
Pedophilia has already been granted protected status by the Federal Government. The Matthew Shephard and James Byrd, Jr. Hate Crimes Prevention Act lists "sexual orientation" as a protected class; however, it does not define the term.
Republicans attempted to add an amendment specifying that "pedophilia is not covered as an orientation;" however, the amendment was defeated by Democrats. Rep. Alcee Hastings (D-Fl) stated that all alternative sexual lifestyles should be protected under the law.
"This bill addresses our resolve to end violence based on prejudice and to guarantee that all Americans, regardless of race, color, religion, national origin, gender, sexual orientation, gender identity, or disability or all of these 'philias' and fetishes and 'isms' that were put forward need not live in fear because of who they are. I urge my colleagues to vote in favor of this rule."
Source: Northern Colorado Gazette
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PlaySight, the tennis firm that has earned a reputation for itself with their SmartCourt know-how, has simply introduced a serious partnership with the Intercollegiate Tennis Association (ITA).
Playsight will probably be hoping that their new relationship with the ITA will permit their product to grow to be a good larger presence on the earth of school tennis. Schools like Northwestern, Virginia Tech and Princeton have already got SmartCourt methods for his or her tennis packages, however this deal will probably add a couple of extra names to that record.
Playsight SmartCourts are primarily six excessive-definition cameras arrange on any tennis courtroom. Three cameras are arrange at every baseline, they usually document the velocity of every serve and swing, the accuracy, the peak of a ball over the web and type.
Moreover, all of those knowledge and analytics factors are immediately accessible on-line or over the Playsight Tennis app. Individuals can entry a SmartCourt reside stream from anyplace, and there's no cap on the quantity of viewers for one in every of these stay stream periods.
For every recorded session, coaches or gamers can entry 3D recreations of every set, and their type on serves and swings.
"On the finish of the day, the ITA believes that PlaySight's know-how will allow coaches and gamers to be simpler, and, finally profitable. And we're notably excited with the potential for LiveCourts to be streaming tennis matches from schools throughout the nation," stated ITA CEO Timothy Russell.
Russell's point out of the reside streaming choice is among the advantages that the ITA might collect from this partnership. If each collegiate tennis courtroom is connected to the SmartCourt system, viewers might simply entry any match.


text:
/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82.h
Label Definition File: CWE134_Uncontrolled_Format_String.label.xml
Template File: sources-sinks-82.tmpl.h
*/
/*
 * @description
 * CWE: 134 Uncontrolled Format String
 * BadSource: environment Read input from an environment variable
 * GoodSource: Copy a fixed string into data
 * Sinks: fprintf
 *    GoodSink: fwprintf with "%s" as the second argument and data as the third
 *    BadSink : fwprintf with data as the second argument
 * Flow Variant: 82 Data flow: data passed in a parameter to an virtual method called via a pointer
 *
 * */

#include "std_testcase.h"

#ifndef _WIN32
#include <wchar.h>
#endif

namespace CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82
{

class CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_base
{
public:
    /* pure virtual function */
    virtual void action(wchar_t * data) = 0;
};

#ifndef OMITBAD

class CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_bad : public CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_base
{
public:
    void action(wchar_t * data);
};

#endif /* OMITBAD */

#ifndef OMITGOOD

class CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_goodG2B : public CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_base
{
public:
    void action(wchar_t * data);
};

class CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_goodB2G : public CWE134_Uncontrolled_Format_String__wchar_t_environment_fprintf_82_base
{
public:
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};

#endif /* OMITGOOD */

}

redpajama_set_name: RedPajamaGithub


text:
Samsung now contradicts selling 1 million units of Samsung Galaxy fold
HomeMobilesSamsung now contradicts selling 1 million units of Samsung Galaxy fold
Samsung President recently claimed that the company sold 1 million units of the foldable handset globally, but actually they did not
Recently Samsung's President Young Sohn announced that the company has managed to sell 1 million units of Samsung Galaxy Fold. But now the company's spokesperson disaffirms the media reports on the statement released by the company's president that it sold a million units globally.
Samsung's spokesperson has released a fresh statement that denies what its company's President said at a conference in Berlin with regard to the Samsung Galaxy Fold's sales. To recall he said that, "And I think that the point is, we're selling [a] million of these products. There's a million people that want to use this product at $2,000."
As per a report by a news agency the spokesperson now says that the Sohn might have confused the figure with the company's initial sales target for the year. This clearly hinted that the company was not able to sell 1 million units of the foldable phone. The company expected to trade 5,00,000 Galaxy Fold across the world this year. Also, it was being analysed that the company will manage to sell around 4,00,000 to 5,00,000 units of Galaxy Fold this year.
Samsung introduced Galaxy Fold at MCW 2019 and went on sale in September with a price tag of $2000. In India, it arrived in September at Rs 1,64,999.
According to industry insiders, the sale of Samsung Galaxy fold will rise next year with a possible million units to be sold in 2020.
The report says that an analyst at Kyobo Securities, Choi Bo-young said, "Samsung is expected to sell 6 million units of its foldable phone in 2020 and 20 million units in 2021. He further added that "Prices of foldable phones are expected to go down gradually, and this would push up demand for foldable handsets."
Besides this, the company is also working on another variant of Galaxy fold that would come with a clamshell design just like Motorola Razr. And is slated to have better technical specifications that the Moto Razr.
Motorola Razr with foldable screen to arrive in India soon
You can now make phone calls directly from your Windows 10 PC


Due to the unique characteristics of clinical data, clinical data warehouses (CDWs) have not been successful so far. Specifically, the use of CDWs for biomedical research has been relatively unsuccessful thus far. The characteristics necessary for the successful implementation and operation of a CDW for biomedical research have not clearly defined yet.
Three examples of CDWs were reviewed: a multipurpose CDW in a hospital, a CDW for independent multi-institutional research, and a CDW for research use in an institution. After reviewing the three CDW examples, we propose some key characteristics needed in a CDW for biomedical research.
A CDW for research should include an honest broker system and an Institutional Review Board approval interface to comply with governmental regulations. It should also include a simple query interface, an anonymized data review tool, and a data extraction tool. Also, it should be a biomedical research platform for data repository use as well as data analysis.
The proposed characteristics desired in a CDW may have limited transfer value to organizations in other countries. However, these analysis results are still valid in Korea, and we have developed clinical research data warehouse based on these desiderata.


Great idea Slinks but I hate you!! makes mine look really rubbish Will dig out some of my creepy crawly pics later! might be an idea to get someone to put a warning in your title that there are spiders !
Maaaaaaaaybe *flutters eyelashes* you could also put some tips on how to photograph creepys then I wouldn't hate you so much.
As to tips, others are probably better qualified to give those!!
Its as easy as this Loubz (you flatterer!!) a decent macro lens Get the 100mm canon macro your thinking about!
Lovely Tortoiseshell Greyowl, I have struggled to get a shot of one of these little beauty's! great stuff!
Owww! I feel a bit embarrassed to post this one in such professional company, but here goes - a dragon fly taken last week in Cornwall.
My garden has been full of them this year. Never seen so many before. They rise in clouds from the tubs of marigolds by the back door.
Great one Coast, is that a red darter dragonfly? Good shot to get it resting, they normally zip about!
Beautiful moth and lovely photo showing detail.
Couldn't say! I saw it on a piece of slate basking in the sunshine and got as close as I could to get this shot.
It's a common darter, I took some photo of one and stuck it in the photography forum not long ago Nice pictures though lots of detail, especially like the moth. Good stuff!
Two From me. These were taken in early September.
Stunning shots Kelly Is it a moth caterpillar?
Thank you Its a monarch caterpillar..
Very nice caterpillars Kelly, I managed to get some rather pathetic pictures of one... all I can say is I can't wait to get a decent macro!
Best Thing I ever Did.. Mines not a full macro lens but something simlar to these..
That is what I have got Kelly, didn't want to pay out for a decent macro if I didn't like macro photography. I do think they lack clarity and the blue haze you get is a pain, but hey can't complain at the price!
This little sod was a tad too small for me to get a decent shot of him but thought i would post up the attempt!
Here's one of mine, not the best shot in the world of Cinnabar Moth caterpillars (with added red soldier beetle).


The Brisbane Disability Expo is on this November in Brisbane! Our helpful team will be there to answer any queries you may have about our early intervention therapy and care. Come down and say hi!
View more information from The Brisbane Disability Expo here.


text:
The Scottish Improvement Science Collaborating Centre Collaborating t create new knowledge in health and social care
2018/2019 Work Programme Development
Sub-Award Reporting
Additional Work
Behaviour Change Resources
Transformative Innovation
Workstreams
Knowledge into Action at Scale
Compassionate Care and Behaviour Change
Evidence into Practice – Neonatal Workstream
Novel Psychoactive Substance Injecting in Scotland (NPSIS)
Older People's Health and Wellbeing
You are here: Home › University of Dundee Lecturer position
University of Dundee Lecturer position
By Gillian Clark on 11/12/2019 in Latest News, Maternal & Child Health, Upcoming Events
The School of Nursing and Health Sciences educates and empowers the next generation of healthcare professionals by equipping our students with the knowledge and skills to influence health policy and service delivery. Through the internationally-renowned Mother and Infant Research Unit (MIRU) we undertake world leading research in maternal and infant health. MIRU aims to generate evidence to inform policy and practice in maternal, infant and early year's health and care, and to reduce the impact of inequalities.
We are recruiting for an exceptional individual to join us as a Lecturer within our vibrant research community to help strengthen our multidisciplinary research in mother and infant health, and health sciences teaching towards REF 2021, and into the future.
The successful candidate's workload will be allocated to enable a focus on research growth. The post-holder will work within the Mother and Infant Research Unit in the School, to help build research capacity, to develop their own research programme, contribute to grant capture, and publish high quality papers in high quality journals. Supervision of master's and doctoral level students will be expected.
This is an exciting opportunity for an early career, post-doctoral academic to develop a strong research and teaching career in a supportive environment, in a School that enables and promotes multidisciplinary working, and innovation. We work extensively with NHS Scotland, and a range of national and international partners, offering significant opportunities to develop networks.
For further information please visit www.jobs.ac.uk
MIRU, Mother and Infant Research Unit, NHS, School of Nursing & Health Sciences, SISCC, SNHS, vacancies
Programme Director – Healthcare Improvement Scotland (Glasgow/Edinburgh)
University of Dundee – Baxter Fellow Lecturer position
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