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

DataBETA

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

STAR

Collaboration

Nov 29, 2021

9 pages

Published in:

Eur.Phys.J.C 82 (2022) 12, 1150,
Eur.Phys.J.C 83 (2023) 6, 455 (erratum)

Published: Dec 20, 2022
and
Published: Jun 1, 2023

e-Print:

2111.14615 [nucl-ex]

DOI:

10.1140/epjc/s10052-022-11003-7,
10.1140/epjc/s10052-023-11425-x (erratum)

Experiments:

BNL-RHIC-STAR,
BNL-RHIC-STAR

View in:

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Abstract: (Springer)

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

\sqrt{s_{\textrm{NN}}}=200

GeV Au+Au collisions to p+p collisions (

R_{\textrm{AA}}

), or in central to peripheral Au+Au collisions (

R_{\textrm{CP}}

). We find the bottom-decay electron

R_{\textrm{AA}}

and

R_{\textrm{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.

quark: energy loss
yield: ratio
heavy ion: scattering
parton: energy loss
heavy quark: suppression
experimental results
scattering: peripheral
D: semileptonic decay
B: semileptonic decay
quark gluon: plasma

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