Disappearance of partonic collectivity in √s.sub.NN./sub. = 3 GeV Au+Au collisions at RHIC

0559794 - ÚJF 2023 RIV NL eng J - Článek v odborném periodiku
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 … celkem 396 autorů
Disappearance of partonic collectivity in √s_NN = 3 GeV Au+Au collisions at RHIC.
Physics Letters. B. Roč. 827, APR (2022), č. článku 137003. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LTT18002; GA MŠMT LM2018109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR experiment * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 4.3, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1016/j.physletb.2022.137003

We report on the measurements of directed flow v(1) and elliptic flow v(2) for hadrons (pi(+/-), K-+/-, K-S(0), p, phi, Lambda and Xi(-)) from Au+Au collisions at root s(NN) = 3GeV and v(2) for (pi(+/-), K-+/-, p and (p) over bar) at 27 and 54.4GeV with the STAR experiment. While at the two higher energy midcentral collisions the number-of-constituent-quark (NCQ) scaling holds, at 3GeV the v(2) at midrapidity is negative for all hadrons and the NCQ scaling is absent. In addition, the v(1) slopes at midrapidity for almost all observed hadrons are found to be positive, implying dominant repulsive baryonic interactions. The features of negative v2 and positive v(1) slope at 3GeV can be reproduced with a baryonic mean-field in transport model calculations. These results imply that the medium in such collisions is likely characterized by baryonic interactions.
Trvalý link: https://hdl.handle.net/11104/0332993