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 - Journal Article
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. … Total 371 authors
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
R&D Projects: GA MŠMT LTT18002
Research Infrastructure: BNL-CZ II - 90109
Institutional support: RVO:61389005
Keywords : STAR collaboration * heavy ion collisions
OECD category: Particles and field physics
Impact factor: 4.4, year: 2022
Method of publishing: 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.
Permanent Link: https://hdl.handle.net/11104/0340958