Study On Production Of Antimatter In High Energy Proton-Proton Collisions

Antimatter and normal matter’s asymmetry in the universe is a basic problem of modern physics research over the past decades. Antimatter is studied widely such as in particle physics and nuclear physics, nuclear astrophysics and cosmology. In recent years with high advance in accelerators and detectors, experiments in high energy nucleus collisions, high temperature and high density nuclear matter are similar to the initial stages of the big bang "fireball" environment, which provides a possible way for scientists to study the evolution of the universe in the experimental study of anti-nuclear matter, as a result, it provides a perfect place for looking for strange matter and antimatter. With the development of modern accelerator technology, scientists have produced and captured anti-hydrogen atoms and light (anti-), nuclear substances in high energy collisions successfully, what’s more, it brings about a wide range of studies. In particular, since (anti-) hypernuclei has been found nuclear physicists showed great interest to explore the strange matter (such as hyper-nuclear, (anti-)hyper-nuclear, and strange Quark bound State)and hyperon nucleon interactions.In this paper we introduces the basic knowledge of particle physics and antimatter research, and simulate high energy collision experiment using models--PACIAE, PYTHIA and hadron cascade model combined with the dynamic constraints model in phase space (DCPC). Then, focus on our work:(1) with PACIAE and PYTHIA models,17.3 GeV,200 GeV,1 TeV,7 TeV,14 TeV, five different energies of high energy proton-proton collisions final State hadrons, we studied five different energies comparatively, the anti-particle distribution, rapidity and transverse momentum distribution characteristics in detail. We found:the distributions of particles are almost similar and three distributions are energy dependent obviously. (2)The data of light (anti-)nuclei and (anti-)hypernuclei by DCPC model and the energy dependence of light (anti-) nuclear were studied in high energy proton-proton collision. We found:in high energy proton-proton collisions the ratio of antiparticle to particle increases with the central mass energy of the collision particle when the energy is greater than 200 GeV of Center of mass, and the ratio is approaching 1; The average transverse momentum of different particles increase with the mass energy rapidly. We compared the model’s results with existing STAR, ALICE and other experimental groups’ data, the results are basically the same.