Hi, I'm not sure if this is the correct section to post this. As far as I know, it is widely accepted that antimatter has "normal" gravity, and that for creating a matter-antimatter pair, you need to input the rest mass of the particle in energy (Einstein's equation). But as potential gravitational energy is, as far as I know dependent on other masses, if I create a pair on an accelerator, wouldn't the input of energy include the potential energy that the particle will have because of all the mass in the universe? That would mean a lot more energy is needed to conserve the energy of the Universe. What I'm missing here? Thanks.