https://doi.org/10.1140/epjc/s10052-022-11003-7
Regular Article - Experimental Physics
Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC
1
Abilene Christian University
2
AGH University of Science and Technology, FPACS
3
Argonne National Laboratory
4
American University of Cairo
5
Ball State University
6
Brookhaven National Laboratory
7
University of Calabria, INFN-Cosenza
8
University of California
9
University of California
10
University of California
11
University of California
12
Central China Normal University
13
University of Illinois at Chicago
14
Creighton University
15
Czech Technical University in Prague, FNSPE
16
Technische Universität Darmstadt
17
ELTE Eötvös Loránd University
18
Frankfurt Institute for Advanced Studies FIAS
19
Fudan University
20
University of Heidelberg
21
University of Houston
22
Huzhou University
23
Indian Institute of Science Education and Research (IISER)
24
Indian Institute of Science Education and Research (IISER) Tirupati
25
Indian Institute Technology
26
Indiana University
27
Institute of Modern Physics, Chinese Academy of Sciences
28
University of Jammu
29
Kent State University
30
University of Kentucky
31
Lawrence Berkeley National Laboratory
32
Lehigh University
33
Max-Planck-Institut für Physik
34
Michigan State University
35
National Institute of Science Education and Research, HBNI
36
National Cheng Kung University
37
Nuclear Physics Institute of the CAS
38
Ohio State University
39
Institute of Nuclear Physics PAN
40
Panjab University
41
Purdue University
42
Rice University
43
Rutgers University
44
Universidade de São Paulo
45
University of Science and Technology of China
46
South China Normal University
47
Shandong University
48
Shanghai Institute of Applied Physics, Chinese Academy of Sciences
49
Southern Connecticut State University
50
State University of New York
51
Instituto de Alta Investigación, Universidad de Tarapacá
52
Temple University
53
Texas A &M University
54
University of Texas
55
Tsinghua University
56
University of Tsukuba
57
United States Naval Academy
58
Valparaiso University
59
Variable Energy Cyclotron Centre
60
Warsaw University of Technology
61
Wayne State University
62
Yale University
Received:
21
June
2022
Accepted:
3
November
2022
Published online:
20
December
2022
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 
GeV Au+Au collisions to p+p collisions (
), or in central to peripheral Au+Au collisions (
). We find the bottom-decay electron and 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.
© The Author(s) 2022. corrected publication 2023
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Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.
