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

STAR Collaboration

doi:10.1140/epjc/s10052-022-11003-7

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

STAR Collaboration

Chemistry

American University in Cairo
Texas A&M University
Czech Technical University in Prague
AGH University of Krakow
Ohio State University
University of Kentucky
Panjab University
Variable Energy Cyclotron Centre India
Brookhaven National Laboratory
Abilene Christian University
Universidad de Tarapacá
University of California
University of Houston
University of Jammu
State University of New York System
Czech Academy of Sciences
Chinese Academy of Sciences
Yale University
Lawrence Berkeley National Laboratory
Indiana University
Warsaw University of Technology
Shandong University
Fudan University
University of Science and Technology of China
Tsinghua University
Eötvös Loránd University
Heidelberg University
Wayne State University

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

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 sNN=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.

Original language	English
Article number	1150
Journal	European Physical Journal C
Volume	82
Issue number	12
DOIs	https://doi.org/10.1140/epjc/s10052-022-11003-7
State	Published - Dec 2022

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@article{89cb086ddac54cd5bcd5bbf72918e033,

title = "Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC",

abstract = "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 sNN=200 GeV Au+Au collisions to p+p collisions (RAA), or in central to peripheral Au+Au collisions (RCP). We find the bottom-decay electron RAA and RCP 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.",

author = "\{STAR Collaboration\} and Abdallah, \{M. S.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and Adkins, \{J. K.\} and I. Aggarwal and Aggarwal, \{M. M.\} and Z. Ahammed and Anderson, \{D. M.\} and Aschenauer, \{E. C.\} and J. Atchison and V. Bairathi and W. Baker and \{Ball Cap\}, \{J. G.\} and K. Barish and R. Bellwied and P. Bhagat and A. Bhasin and S. Bhatta and J. Bielcik and J. Bielcikova and Brandenburg, \{J. D.\} and Cai, \{X. Z.\} and H. Caines and \{de la Barca S{\'a}nchez\}, \{M. Calder{\'o}n\} and D. Cebra and I. Chakaberia and P. Chaloupka and Chan, \{B. K.\} and Z. Chang and A. Chatterjee and S. Chattopadhyay and D. Chen and J. Chen and Chen, \{J. H.\} and X. Chen and Z. Chen and J. Cheng and S. Choudhury and W. Christie and X. Chu and Crawford, \{H. J.\} and M. Csan{\'a}d and M. Daugherity and Deppner, \{I. M.\} and A. Dhamija and Carlo, \{L. Di\} and J. Jia and R. Lacey",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = dec,

doi = "10.1140/epjc/s10052-022-11003-7",

language = "English",

volume = "82",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "12",

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TY - JOUR

T1 - Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC

AU - STAR Collaboration

AU - Abdallah, M. S.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adamczyk, L.

AU - Adams, J. R.

AU - Adkins, J. K.

AU - Aggarwal, I.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Anderson, D. M.

AU - Aschenauer, E. C.

AU - Atchison, J.

AU - Bairathi, V.

AU - Baker, W.

AU - Ball Cap, J. G.

AU - Barish, K.

AU - Bellwied, R.

AU - Bhagat, P.

AU - Bhasin, A.

AU - Bhatta, S.

AU - Bielcik, J.

AU - Bielcikova, J.

AU - Brandenburg, J. D.

AU - Cai, X. Z.

AU - Caines, H.

AU - de la Barca Sánchez, M. Calderón

AU - Cebra, D.

AU - Chakaberia, I.

AU - Chaloupka, P.

AU - Chan, B. K.

AU - Chang, Z.

AU - Chatterjee, A.

AU - Chattopadhyay, S.

AU - Chen, D.

AU - Chen, J.

AU - Chen, J. H.

AU - Chen, X.

AU - Chen, Z.

AU - Cheng, J.

AU - Choudhury, S.

AU - Christie, W.

AU - Chu, X.

AU - Crawford, H. J.

AU - Csanád, M.

AU - Daugherity, M.

AU - Deppner, I. M.

AU - Dhamija, A.

AU - Carlo, L. Di

AU - Jia, J.

AU - Lacey, R.

PY - 2022/12

Y1 - 2022/12

N2 - 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 sNN=200 GeV Au+Au collisions to p+p collisions (RAA), or in central to peripheral Au+Au collisions (RCP). We find the bottom-decay electron RAA and RCP 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.

AB - 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 sNN=200 GeV Au+Au collisions to p+p collisions (RAA), or in central to peripheral Au+Au collisions (RCP). We find the bottom-decay electron RAA and RCP 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.

UR - https://www.scopus.com/pages/publications/85150218688

U2 - 10.1140/epjc/s10052-022-11003-7

DO - 10.1140/epjc/s10052-022-11003-7

M3 - Article

AN - SCOPUS:85150218688

SN - 1434-6044

VL - 82

JO - European Physical Journal C

JF - European Physical Journal C

IS - 12

M1 - 1150

ER -

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

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