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@ARTICLE{Aad:588805,
author = {Aad, Georges and others},
collaboration = {{ATLAS Collaboration}},
title = {{C}omparison of inclusive and photon-tagged jet suppression
in 5.02 {T}e{V} {P}b+{P}b collisions with {ATLAS}},
reportid = {PUBDB-2023-04962, arXiv:2303.10090. CERN-EP-2023-029},
year = {2023},
note = {42 pages in total, author list starting page 25, 9 figures,
submitted to Phys. Lett. B. All figures including auxiliary
figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2022-14/},
abstract = {Parton energy loss in the quark-gluon plasma (QGP) is
studied with a measurement of photon-tagged jet production
in 1.7 nb$^{-1}$ of Pb+Pb data and 260 pb$^{-1}$ of $pp$
data, both at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV, with the
ATLAS detector. The process $pp \to \gamma$+jet+$X$ and its
analogue in Pb+Pb collisions is measured in events
containing an isolated photon with transverse momentum
($p_\mathrm{T}$) above $50$ GeV and reported as a function
of jet $p_\mathrm{T}$. This selection results in a sample of
jets with a steeply falling $p_\mathrm{T}$ distribution that
are mostly initiated by the showering of quarks. The $pp$
and Pb+Pb measurements are used to report the nuclear
modification factor, $R_\mathrm{AA}$, and the fractional
energy loss, $S_\mathrm{loss}$, for photon-tagged jets. In
addition, the results are compared with the analogous ones
for inclusive jets, which have a significantly smaller
quark-initiated fraction. The $R_\mathrm{AA}$ and
$S_\mathrm{loss}$ values are found to be significantly
different between those for photon-tagged jets and inclusive
jets, demonstrating that energy loss in the QGP is sensitive
to the colour-charge of the initiating parton. The results
are also compared with a variety of theoretical models of
colour-charge-dependent energy loss.},
keywords = {quark gluon: plasma (INSPIRE) / jet: production (INSPIRE) /
jet: suppression (INSPIRE) / parton: energy loss (INSPIRE) /
ATLAS (INSPIRE) / TeV (INSPIRE) / GeV (INSPIRE) / lead
(INSPIRE) / CERN LHC Coll (INSPIRE) / photon: production
(INSPIRE) / Brookhaven RHIC Coll (INSPIRE) / transverse
momentum (INSPIRE) / nucleon (INSPIRE) / PHENIX (INSPIRE) /
hadron (INSPIRE) / Monte Carlo (INSPIRE) / Glauber (INSPIRE)
/ numerical calculations (INSPIRE) / quark (INSPIRE) /
nucleus (INSPIRE) / fractional (INSPIRE)},
cin = {ATLAS},
cid = {I:(DE-H253)ATLAS-20120731},
pnm = {611 - Fundamental Particles and Forces (POF4-611)},
pid = {G:(DE-HGF)POF4-611},
experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
typ = {PUB:(DE-HGF)25},
eprint = {2303.10090},
howpublished = {arXiv:2303.10090},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2303.10090;\%\%$},
doi = {10.3204/PUBDB-2023-04962},
url = {https://bib-pubdb1.desy.de/record/588805},
}