Hi
Where is the antimatter ?
During the Bigbang the energy 'condensed' into matter and antimatter. If we accept the Feynman–Stueckelberg interpretation of antimatter, that antimatter are particle going back in time, then there was nothing before the 'condensation' so the antimatter never encontered matter. Anti matter that was created in that time are going back in time and will never meet matter.
Is it something that was thaught before ?
Thanks
Two accelerated proton beams is much harder to perform experiment, than having stationary protons in chamber, and single beam of protons.
We need to see, detect, "catch" these newly made particles, and keep them in magnetic traps (so they won't annihilate) for further experiments..
It's even harder to describe annihilation process of proton-antiproton. Their acceleration also matters. Accelerated antiprotons colliding with stationary protons will produce something else than stationary