Publication: Probing strangeness canonical ensemble with K−, ϕ(1020) and Ξ− production in Au+Au collisions at sNN=3 GeV
Дата
2022
Авторы
Abdallah, M. S.
Aboona, B. E.
Adam, J.
Adamczyk, L.
Alekseev, I.
Brandin, A. V.
Khyzhniak, Y. V.
Kochenda, L.
Kravtsov, P.
Nigmatkulov, G.
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Аннотация
© 2022 The Author(s)We report the first multi-differential measurements of strange hadrons of K−, ϕ and Ξ− yields as well as the ratios of ϕ/K− and ϕ/Ξ− in Au+Au collisions at sNN=3 GeV with the STAR experiment fixed target configuration at RHIC. The ϕ mesons and Ξ− hyperons are measured through hadronic decay channels, ϕ→K+K− and Ξ−→Λπ−. Collision centrality and rapidity dependence of the transverse momentum spectra for these strange hadrons are presented. The 4π 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 ϕ/K− and ϕ/Ξ− ratios while the result of canonical ensemble (CE) calculations reproduce ϕ/K−, with the correlation length rc∼2.7 fm, and ϕ/Ξ−, rc∼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.
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Цитирование
Probing strangeness canonical ensemble with K−, ϕ(1020) and Ξ− production in Au+Au collisions at sNN=3 GeV / Abdallah, M.S. [et al.] // Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - 2022. - 831. - 10.1016/j.physletb.2022.137152
URI
https://www.doi.org/10.1016/j.physletb.2022.137152
https://www.scopus.com/record/display.uri?eid=2-s2.0-85132377970&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000833529700001
https://openrepository.mephi.ru/handle/123456789/28003
https://www.scopus.com/record/display.uri?eid=2-s2.0-85132377970&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000833529700001
https://openrepository.mephi.ru/handle/123456789/28003