The energy dependence of antiparticle to particle ratios in high energy pp collisions

TL;DR

This study investigates how antiparticle to particle ratios and transverse momentum distributions in high-energy proton-proton collisions depend on collision energy, showing ratios approach unity and momentum increases with energy.

Contribution

It introduces the PACIEA and DCPC models to analyze energy dependence of antiparticle to particle ratios and transverse momentum in high-energy pp collisions.

Findings

Antiparticle to particle ratios increase with energy, approaching 1 beyond 200 GeV.

Average transverse momentum increases with collision energy and mass.

Model results align with STAR experimental data.

Abstract

The energy dependence of antiparticle to particle ratios in pp collisions of high energy is studied using the PACIEA and DCPC model. The yield ratios of antimatter and matter for different masses are measured at various energies. It is found that the yield ratios of antimatter and matter increase with the increase of the c.m energy of pp collisions until they gradually approach to 1 after the c.m energy is more than 200 GeV. The distribution of transverse momentum also has signiffcant dependence on the energy and mass, i.e the average transverse momentum increase when the c.m energy of pp collisions increase. The model results are compatible with the STAR preliminary datum.