Probing strangeness canonical ensemble with K.sup.–./sup., ɸ(1020) and Ξ.sup.–./sup. production in Au+Au collisions at √s.sub.NN./sub.=3 GeV

0560211 - ÚJF 2023 RIV NL eng J - Journal Article
Abdallah, M. S. - Aboona, B. E. - Adam, J. - Adamczyk, L. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Ponimatkin, Georgij - Prozorova, V. - Robotková, Monika - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … Total 397 authors
Probing strangeness canonical ensemble with K^–, ɸ(1020) and Ξ^– production in Au+Au collisions at √s_NN=3 GeV.
Physics Letters. B. Roč. 831, AUG (2022), č. článku 137152. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LTT18002; GA MŠMT LM2018109
Institutional support: RVO:61389005
Keywords : STAR experiment * heavy ion collisions
OECD category: Nuclear physics
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2022.137152

We report the first multi-differential measurements of strange hadrons of K-, phi and Xi(-) yields as well as the ratios of phi/K- and phi/Xi(-) in Au+Au collisions at root S-NN = 3 GeV with the STAR experiment fixed target configuration at RHIC. The phi mesons and Xi(-) hyperons are measured through hadronic decay channels, phi -> K+K- and Xi(- )-> Lambda pi(-). Collision centrality and rapidity dependence of the transverse momentum spectra for these strange hadrons are presented. The 4 pi yields and ratios are compared to thermal model and hadronic transport model predictions. At this collision energy, thermal model with grand canonical ensemble (GCE) under-predicts the phi/K- and phi/Xi(-) ratios while the result of canonical ensemble (CE) calculations reproduce phi/K-, with the correlation length r(c) similar to 2.7 fm, and phi/Xi(-), r(c) similar to 4.2 fm, for the 0-10% central collisions. Hadronic transport models including high mass resonance decays could also describe the ratios. While thermal calculations with GCE work well for strangeness production in high energy collisions, the change to CE at 3 GeV implies a rather different medium property at high baryon density.
Permanent Link: https://hdl.handle.net/11104/0333221