Azimuthal anisotropy measurement of (multi)strange hadrons in Au+Au collisions at √s.sub.NN./sub.=54.4 GeV

0573032 - ÚJF 2024 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, J. … celkem 365 autorů
Azimuthal anisotropy measurement of (multi)strange hadrons in Au+Au collisions at √s_NN=54.4 GeV.
Physical Review C. Roč. 107, č. 2 (2023), č. článku 024912. ISSN 2469-9985. E-ISSN 2469-9993
Výzkumná infrastruktura: BNL-CZ III - 90234
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion experiment
Obor OECD: Particles and field physics
Impakt faktor: 3.1, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevC.107.024912

Azimuthal anisotropy of produced particles is one of the most important observables used to access the collective properties of the expanding medium created in relativistic heavy-ion collisions. In this paper, we present second (v2) and third (v3) order azimuthal anisotropies of KS0, 0, A, E, and Q at midrapidity (|y| < 1) in Au+Au collisions at root sNN = 54.4 GeV measured by the STAR detector. The v2 and v3 are measured as a function of transverse momentum and centrality. Their energy dependence is also studied. v3 is found to be more sensitive to the change in the center-of-mass energy than v2. Scaling by constituent quark number is found to hold for v2 within 10%. This observation could be evidence for the development of partonic collectivity in 54.4 GeV Au+Au collisions. Differences in v2 and v3 between baryons and antibaryons are presented, and ratios of v3/v3/2 2 are studied and motivated by hydrodynamical calculations. The ratio of v2 of phi mesons to that of antiprotons [v2(phi)/v2(p over line )] shows centrality dependence at low transverse momentum, presumably resulting from the larger effects from hadronic interactions on antiproton v2.
Trvalý link: https://hdl.handle.net/11104/0343557