Light nuclei collectivity from √s.sub.NN./sub. = 3 GeV Au+Au collisions at RHIC

0559783 - ÚJF 2023 RIV NL 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 395 autorů
Light nuclei collectivity from √s_NN = 3 GeV Au+Au collisions at RHIC.
Physics Letters. B. Roč. 827, APR (2022), č. článku 136941. 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: Particles and field physics
Impakt faktor: 4.3, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1016/j.physletb.2022.136941

In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in root s(NN) = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and second-order azimuthal anisotropic parameters, v(1) and v(2), of light nuclei (d, t, He-3, He-4) produced in root s(NN) = 3 GeV Au+Au collisions at the STAR experiment. An atomic mass number scaling is found in the measured v(1) slopes of light nuclei at mid-rapidity. For the measured v(2) magnitude, a strong rapidity dependence is observed. Unlike v(2) at higher collision energies, the v(2) values at mid-rapidity for all light nuclei are negative and no scaling is observed with the atomic mass number. Calculations by the Jet AA Microscopic Transport Model (JAM), with baryonic mean-field plus nucleon coalescence, are in good agreement with our observations, implying baryonic interactions dominate the collective dynamics in 3 GeV Au+Au collisions at RHIC.
Trvalý link: https://hdl.handle.net/11104/0332984