Comparison of inclusive and photon-tagged jet suppression in 5.02 TeV Pb+Pb collisions with ATLAS

Aad, Georges; Abbott, Braden Keim; Abeling, Kira; Abicht, Nils Julius; Abidi, Haider; Aboulhorma, Asmaa; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming; Abusleme, Angel

doi:10.1016/j.physletb.2023.138154

Comparison of inclusive and photon-tagged jet suppression in 5.02 TeV Pb+Pb collisions with ATLAS

ATLAS

Collaboration

Mar 17, 2023

27 pages

Published in:

Phys.Lett.B 846 (2023) 138154

Published: Aug 29, 2023

e-Print:

2303.10090 [nucl-ex]

DOI:

10.1016/j.physletb.2023.138154 (publication)

Report number:

CERN-EP-2023-029

Experiments:

CERN-LHC-ATLAS

View in:

datasets

reference search28 citations

Citations per year

Abstract: (Elsevier B.V.)

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_{NN}} = 5.02

TeV, with the ATLAS detector. The process pp →γ+jet+X and its analogue in Pb+Pb collisions is measured in events containing an isolated photon with transverse momentum (

p_{T}

) above 50 GeV and reported as a function of jet

p_{T}

. This selection results in a sample of jets with a steeply falling

p_{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_{AA}

, and the fractional energy loss,

S_{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_{AA}

and

S_{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.

Note:

All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2022-14/

quark gluon: plasma
jet: production
jet: suppression
parton: energy loss
ATLAS
TeV
GeV
lead
CERN LHC Coll
photon: production

References(79)

Figures(9)

[1]

Relativistic Fluid Dynamics In and Out of Equilibrium

Paul Romatschke
(
- Colorado U.
)
,
Ulrike Romatschke
(
- Colorado U. and
- NCAR, Boulder
)

•
e-Print:
- 1712.05815
•
DOI:
- 10.1017/9781108651998

[2]

Collective flow and viscosity in relativistic heavy-ion collisions

Ulrich Heinz
(
- Ohio State U.
)
,
Raimond Snellings
(
- Utrecht U.
)

- Ann.Rev.Nucl.Part.Sci. 63 (2013) 123-151
•
e-Print:
- 1301.2826
•
DOI:
- 10.1146/annurev-nucl-102212-170540

[3]

The exploration of hot and dense nuclear matter: introduction to relativistic heavy-ion physics

Hannah Elfner
(
- Darmstadt, GSI and
- Frankfurt U. and
- Frankfurt U., FIAS and
- Helmholtz Res. Acad. Hesse for FAIR
)
,
Berndt Müller
(
- Duke U.
)

- J.Phys.G 50 (2023) 10, 103001
•
e-Print:
- 2210.12056
•
DOI:
- 10.1088/1361-6471/ace824

[4]

Studying the QGP with Jets at the LHC and RHIC

- Prog.Part.Nucl.Phys. 124 (2022) 103940
•
e-Print:
- 2110.14490
•
DOI:
- 10.1016/j.ppnp.2022.103940

[5]

Glauber modeling in high energy nuclear collisions

- Ann.Rev.Nucl.Part.Sci. 57 (2007) 205-243
•
e-Print:
- nucl-ex/0701025
•
DOI:
- 10.1146/annurev.nucl.57.090506.123020

[6]

Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 01 (2016) 006
•
e-Print:
- 1509.09029
•
DOI:
- 10.1007/JHEP01(2016)006

[7]

Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Phys.Rev.C 100 (2019) 6, 064901,
- Phys.Rev.C 101 (2020) 5, 059903 (erratum)
•
e-Print:
- 1908.05264
•
DOI:
- 10.1103/PhysRevC.100.064901

[8]

Measurement of the nuclear modification factor for inclusive jets in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV with the ATLAS detector

ATLAS

Collaboration

•

Morad Aaboud
(
- Oujda U.
)

et al.

- Phys.Lett.B 790 (2019) 108-128
•
e-Print:
- 1805.05635
•
DOI:
- 10.1016/j.physletb.2018.10.076

[9]

First measurement of large area jet transverse momentum spectra in heavy-ion collisions

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 05 (2021) 284
•
e-Print:
- 2102.13080
•
DOI:
- 10.1007/JHEP05(2021)284

[10]

Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV

ALICE

Collaboration

•

Shreyasi Acharya
(
- Calcutta, VECC
)

et al.

- Phys.Rev.C 101 (2020) 3, 034911
•
e-Print:
- 1909.09718
•
DOI:
- 10.1103/PhysRevC.101.034911

[11]

nCTEQ15 - Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

K. Kovarik
(
- Munster U., ITP
)
,
A. Kusina
(
- LPSC, Grenoble
)
,
T. Jezo
(
- INFN, Milan Bicocca and
- Milan Bicocca U.
)
,
D.B. Clark
(
- Southern Methodist U.
)
,
C. Keppel
(
- Jefferson Lab
)

et al.

- Phys.Rev.D 93 (2016) 8, 085037
•
e-Print:
- 1509.00792
•
DOI:
- 10.1103/PhysRevD.93.085037

[12]

EPPS21: a global QCD analysis of nuclear PDFs

Kari J. Eskola
(
- Jyvaskyla U. and
- Helsinki U.
)
,
Petja Paakkinen
(
- Jyvaskyla U. and
- Helsinki U. and
- Santiago de Compostela U., IGFAE
)
,
Hannu Paukkunen
(
- Jyvaskyla U. and
- Helsinki U.
)
,
Carlos A. Salgado
(
- Santiago de Compostela U., IGFAE
)

- Eur.Phys.J.C 82 (2022) 5, 413
•
e-Print:
- 2112.12462
•
DOI:
- 10.1140/epjc/s10052-022-10359-0

[13]

nNNPDF3.0: evidence for a modified partonic structure in heavy nuclei

Rabah Abdul Khalek
(
- Vrije U., Amsterdam and
- Nikhef, Amsterdam
)
,
Rhorry Gauld
(
- Bonn U.
)
,
Tommaso Giani
(
- Vrije U., Amsterdam and
- Nikhef, Amsterdam
)
,
Emanuele R. Nocera
(
- U. Edinburgh, Higgs Ctr. Theor. Phys.
)
,
Tanjona R. Rabemananjara
(
- Vrije U., Amsterdam and
- Nikhef, Amsterdam and
- INFN, Milan and
- Milan U.
)

et al.

- Eur.Phys.J.C 82 (2022) 6, 507
•
e-Print:
- 2201.12363
•
DOI:
- 10.1140/epjc/s10052-022-10417-7

[14]

Interpreting single jet measurements in Pb $+$ Pb collisions at the LHC

Martin Spousta
(
- Charles U.
)
,
Brian Cole
(
- Columbia U. and
- Nevis Labs, Columbia U.
)

- Eur.Phys.J.C 76 (2016) 2, 50
•
e-Print:
- 1504.05169
•
DOI:
- 10.1140/epjc/s10052-016-3896-0

[15]

Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions

- Phys.Rev.Lett. 127 (2021) 25, 252301
•
e-Print:
- 2101.01742
•
DOI:
- 10.1103/PhysRevLett.127.252301

[16]

Quenching effects in the cumulative jet spectrum

Adam Takacs
(
- Bergen U. and
- Lund U.
)
,
Konrad Tywoniuk
(
- Bergen U.
)

- JHEP 10 (2021) 038,
- Journal of High Energy Physics volume 2021, Article number: 38 (2021)
•
e-Print:
- 2103.14676
•
DOI:
- 10.1007/JHEP10(2021)038