Antimatter production in proton-proton and heavy-ion collisions at ultrarelativistic energies

Abstract

One of the striking features of particle production at high beam energies is the near-equal abundance of matter and antimatter in the central rapidity region. In this paper we study how this symmetry is reached as the beam energy is increased. In particular, we quantify explicitly the energy dependence of the approach to matter-antimatter symmetry in proton-proton and in heavy-ion collisions. Expectations are presented also for the production of more complex forms of antimatter such as antihypernuclei.

Light (anti-)nuclei production and flow in relativistic heavy-ion collisions

“…For light nuclei production in heavy ion collisions, both the statistical model [29,30], which assumes that light nuclei are in both thermal and chemical equilibrium with all other particles in the produced hot dense matter, and the coalescence model have been used. In the present study, we use the coalescence model to study light nuclei production based on the phase-space distributions of protons, neutrons, and Lambdas as well as their antiparticles from the AMPT model described in the previous section.…”

Light Cluster Production at NICA

“…Under LHC conditions, the freeze-out model [8,9,10] appears to describe the abundancies very accurately [11]. Very recently, the data for production of light nuclei in the NA49 experiment at SPS have been published which are interpreted using the statistical model too [12].…”

Thermal model for small systems

“…The dependence of T and μ B on the beam energy is taken from heavy-ion collisions [3]. For p-p collisions slightly different parameters are more suited [22] but were not used. Therefore, the shown calculations give the general trend only.…”