Journal Article

GSI-2026-00006

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Resonance suppression during the hadronic stage from the FAIR to the intermediate RHIC energy regime

Chabane, A. (Corresponding author)GSI* ; Engel, L. ; Reichert, T.GSI* ; Steinheimer, J. ; Bleicher, M.GSI*

2025
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevC.111.034913  doi:10.15120/GSI-2026-00006

Abstract: The energy and centrality dependence of the kaon resonance ratio (K∗0 + ¯K∗0 )/(K+ + K− ) is explored inthe RHIC-BES and CBM-FAIR energy regime. To this aim, the ultrarelativistic quantum molecular dynamicsmodel is employed to simulate reconstructable K∗ resonances in Au + Au and p + p collisions from √s NN =3–39 GeV. We obtain a good description of the resonance yields and mean transverse momenta over the wholeinvestigated energy range. The decrease of the K∗/K ratio with increasing centrality is in line with the availableexperimental data. We also observe the experimenatlly measured increase in 〈pT〉 with increasing centralitywhich is interpreted as a lower reconstruction probability of low-pT K∗ due to the pT dependent absorption of thedecay daughter hadrons. We conclude that the observed suppression of reconstructable K∗ resonances providesa strong sign of an extended hadronic rescattering stage at all investigated energies. Its duration increases fromperipheral to central reactions as expected. Following a method, suggested by the STAR experiment, a lowerbound on the duration of the hadronic stage is extracted using the K∗/K ratios at chemical and kinetic freeze-out.The resulting lifetimes are in good agreement with the experimental data, but shorter than the actual lifetime ofthe hadronic phase in the transport simulations.

Note: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Fundedby SCOAP3.

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Contributing Institute(s):

1. Heiße & Dichte QCD Materie (TES)
2. Helmholtz ForschAkad Hess. f. FAIR, HFHF (FHF)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) (SUC-GSI-FR)
3. FIAS - Frankfurt Institute for Advanced Studies (FIAS) (FIAS)
4. STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) (824093)
5. Physics of hot and dense matter - Theory (HFHF project) (I:(DE-Ds200)HFHF-HI-Th) (I:(DE-Ds200)HFHF-HI-Th)

Experiment(s):

1. no experiment theory work (theory)

Appears in the scientific report 2025

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Database coverage:
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