Journal Article

GSI-2022-00271

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of modified light-flavor hadron spectra on particle yields in the statistical hadronization model

Andronic, A. ; Braun-Munzinger, P.GSI* ; Gündüz, D. ; Kirchhoff, Y. ; Köhler, M. K. ; Stachel, J. (Corresponding author)GSI* ; Winn, M.

2021
North-Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.nuclphysa.2021.122176  doi:10.15120/GSI-2022-00271

Report No.: arXiv:2011.03826

Abstract: Hadron production in relativistic nuclear collisions is well described in the framework of the Statistical Hadronization Model (SHM). We investigate the influence on SHM predictions of hadron mass spectra for light-flavor baryons and mesons modified by the addition of about 500 new states as predicted by lattice QCD and a relativistic quark model. The deterioration of the resulting thermodynamic fit quality obtained for Pb–Pb collision data at sNN=2.76 TeV suggests that the additional states are not suited to be naively used since also interactions among the states as well as non-resonant contributions need to be considered in the SHM approach. Incorporating these effects via the pion nucleon interaction determined from measured phase shifts leads again to excellent reproduction of the experimental data. This is a strong indication that at least the additional nucleon excited states cannot be understood and used as independent resonances.

Keyword(s): hadronization: statistical ; hadronization: model ; nucleon: interaction ; nucleus nucleus: scattering ; quark model: relativistic ; hadron: mass spectrum ; hadron: production ; particle: yield ; lattice field theory ; hadron spectroscopy ; thermodynamical ; excited state ; phase shift ; 2760 GeV-cms/nucleon ; Relativistic nuclear collisions ; Statistical hadronization model ; Hadron yields PbPb collisions LHC

Note: Funded in part by the DFG (German Research Foundation) – Project-ID 273811115 – SFB1225/ISOQUANT. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Contributing Institute(s):

1. ExtreMe Matter Institute, EMMI (EXM)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)

Experiment(s):

1. no experiment theory work (POF3; theory)

Appears in the scientific report 2021

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