Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au plus Au Collisions at RHIC

0569561 - 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, J. … celkem 371 autorů
Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au plus Au Collisions at RHIC.
European Physical Journal C. Roč. 82, č. 12 (2022), č. článku 1150. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT LTT18002
Výzkumná infrastruktura: BNL-CZ II - 90109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion collisions
Obor OECD: Particles and field physics
Impakt faktor: 4.4, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1140/epjc/s10052-022-11003-7

Partons traversing the strongly interacting medium produced in heavy-ion collisions are expected to lose energy depending on their color charge and mass. We measure the nuclear modification factors for charm- and bottom-decay electrons, defined as the ratio of yields, divided by the number of binary nucleon-nucleon collisions, in root S-NN = 200 GeV Au+Au collisions to p+p collisions (R-AA), or in central to peripheral Au+Au collisions (R-CP). We find the bottom-decay electron R-AA and R-CP to be significantly higher than those of charm-decay electrons. Model calculations including mass-dependent parton energy loss in a strongly coupled medium are consistent with the measured data. These observations provide evidence of mass ordering of charm and bottom quark energy loss when traversing through the strongly coupled medium created in heavy-ion collisions.
Trvalý link: https://hdl.handle.net/11104/0340958