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- W3184456116 abstract "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 $5ensuremath{pi}ensuremath{rightarrow}mathrm{p}overline{mathrm{p}}$. We investigate $mathrm{Au}+mathrm{Au}$ and $mathrm{Pb}+mathrm{Pb}$ collisions from $sqrt{{s}_{NN}}=17.3phantom{rule{4pt}{0ex}}mathrm{GeV}ensuremath{-}5.02$ 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." @default.
- W3184456116 created "2021-08-02" @default.
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- W3184456116 date "2022-06-09" @default.
- W3184456116 modified "2023-10-18" @default.
- W3184456116 title "Role of proton-antiproton regeneration in the late stages of heavy-ion collisions" @default.
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- W3184456116 doi "https://doi.org/10.1103/physrevc.105.064906" @default.
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