Projections of two-particle correlations onto transverse rapidity in Au + Au collisions at √s.sub.NN./sub.=200 GeV at STAR

0566029 - ÚJF 2023 RIV US eng J - Článek v odborném periodiku
Abdallah, M. S. - Aboona, B. E. - Adam, J. - Adamczyk, L. - Bielčík, J. - Bielčíková, Jana - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Prozorova, V. - Robotková, Monika - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … celkem 390 autorů
Projections of two-particle correlations onto transverse rapidity in Au + Au collisions at √s_NN=200 GeV at STAR.
Physical Review C. Roč. 106, č. 4 (2022), č. článku 044906. ISSN 2469-9985. E-ISSN 2469-9993
Grant CEP: GA MŠMT LTT18002
Výzkumná infrastruktura: BNL-CZ II - 90109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR experiment * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 3.1, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevC.106.044906

We report precision measurements of hypernuclei H-3(Lambda) and H-4(Lambda) lifetimes obtained from Au + Au collisions at root s(NN) = 3.0 GeV and 7.2 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider, and the first measurement of H-3(Lambda) and H-4(Lambda) midrapidity yields in Au + Au collisions at root s(NN) = 3.0 GeV. H-3(Lambda) and H-4(Lambda), being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be 221 +/- 15(stat) +/- 19(syst) ps for H-3(Lambda) and 218 +/- 6(stat) +/- 13(syst) ps for H-4(Lambda). The p(T)-integrated yields of H-3(Lambda) and H-4(Lambda) are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of H-4(Lambda) is different for 0%-10% and 10%-50% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the H-3(Lambda) yield well, while underestimating the H-4(Lambda) yield. Transport models, combining baryonic mean-field and coalescence (JAM) or utilizing dynamical cluster formation via baryonic interactions (PHQMD) for light nuclei and hypernuclei production, approximately describe the measured H-3(Lambda) and H-4(Lambda) yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei.
Trvalý link: https://hdl.handle.net/11104/0337468