TY  - JOUR
A1  - García-Montero, Oscar
A1  - Staudenmaier, Jan
A1  - Schäfer, Anna
A1  - Torres-Rincon, Juan M.
A1  - Petersen, Hannah
T1  - Role of proton-antiproton regeneration in the late stages of heavy-ion collisions
T2  - Physical review C
N2  - We investigate the long-standing question of the effect of proton-antiproton annihilation on the (anti-)proton yield, while respecting detailed balance for the five-body back-reaction for the first time in a full microscopic description of the late stages of heavy-ion collisions. This is achieved by employing a stochastic collision criterion in a hadronic transport approach (SMASH), which is used to account for the regeneration of (anti-)protons via 5π→p¯p. We investigate Au+Au and Pb+Pb collisions from √sNN=17.3GeV−5.02 TeV in a viscous hybrid approach. Our results show that back-reactions happen for a fraction of 15%–20% of all annihilations, independent of the beam energy or centrality of the system. The inclusion of the back-reaction results in the regeneration of half of the (anti-)proton yield lost to annihilations at midrapidity. We also find that, concerning the multiplicities, treating the back-reaction as a chain of two-body reactions is equivalent to a single 5-to-2 reaction.
KW  - Hadron-hadron interactions
KW  - Particle & resonance production
KW  - Relativistic heavy-ion collisions
KW  - Thermal & statistical models
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/63225
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-632253
SN  - 2469-9993
N1  - Funded by SCOAP3.
N1  - This project was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project No. 315477589–TRR 211. This work was supported in part by the National Science Foundation (NSF) within the framework of the JETSCAPE collaboration, under Grants No. ACI-1550228 and No. OAC-2004571.
VL  - 105
IS  - 6, art. 064906
SP  - 1
EP  - 6
PB  - Inst.
CY  - Woodbury, NY
ER  -