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Final state hadronic rescattering with UrQMD

Abstract : In this talk we discuss the effects of the hadronic rescattering on final state observables in high energy nuclear collisions. We do so by employing the UrQMD transport model for a realistic description of the hadronic decoupling process. The rescattering of hadrons modifies every hadronic bulk observable. For example apparent multiplicity of resonances is suppressed as compared to a chemical equilibrium freeze-out model. Stable and unstable particles change their momentum distribution by more than 30% through rescattering. The hadronic rescattering also leads to a substantial decorrelation of the conserved charge distributions. These findings show that it is all but trivial to conclude from the final state observables on the properties of the system at an earlier time where it may have been in or close to local equilibrium.
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https://hal.archives-ouvertes.fr/hal-02739934
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Submitted on : Tuesday, June 2, 2020 - 10:29:16 PM
Last modification on : Wednesday, April 21, 2021 - 8:07:31 AM

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J. Steinheimer, V. Vovchenko, Joerg Aichelin, M. Bleicher, H. Stöcker. Final state hadronic rescattering with UrQMD. 17th International Conference on Strangeness in Quark Matter, Jul 2017, Utrecht, Netherlands. pp.05003, ⟨10.1051/epjconf/201817105003⟩. ⟨hal-02739934⟩

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