Role of proton-antiproton regeneration in the late stages of heavy-ion collisions
- 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.
Author: | Oscar García-MonteroORCiDGND, Jan StaudenmaierORCiDGND, Anna SchäferORCiDGND, Juan M. Torres-RinconORCiDGND, Hannah PetersenORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-632253 |
DOI: | https://doi.org/10.1103/PhysRevC.105.064906 |
ISSN: | 2469-9993 |
Parent Title (English): | Physical review C |
Publisher: | Inst. |
Place of publication: | Woodbury, NY |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2022/06/09 |
Date of first Publication: | 2022/06/09 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2023/02/06 |
Tag: | Hadron-hadron interactions; Particle & resonance production; Relativistic heavy-ion collisions; Thermal & statistical models |
Volume: | 105 |
Issue: | 6, art. 064906 |
Article Number: | 064906 |
Page Number: | 6 |
First Page: | 1 |
Last Page: | 6 |
Note: | Funded by SCOAP3. |
Note: | 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. |
HeBIS-PPN: | 505636131 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 International |