Measurements of azimuthal anisotropies of jet production in Pb+Pb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV with the ATLAS detector

Aad, Georges; Abbott, Braden Keim; Abbott, Dale; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Haider; Aboulhorma, Asmaa; Abramowicz, Halina; Abreu, Henso

doi:10.1103/PhysRevC.105.064903

Measurements of azimuthal anisotropies of jet production in Pb+Pb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV with the ATLAS detector

ATLAS

Collaboration

Nov 12, 2021

41 pages

Published in:

Phys.Rev.C 105 (2022) 6, 064903

Published: Jun 7, 2022

e-Print:

2111.06606 [nucl-ex]

DOI:

10.1103/PhysRevC.105.064903 (publication)

Report number:

CERN-EP-2021-218

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (APS)

The azimuthal variation of jet yields in heavy-ion collisions provides information about the path-length dependence of the energy loss experienced by partons passing through the hot, dense nuclear matter known as the quark–gluon plasma. This paper presents the azimuthal anisotropy coefficients

v_{2}, v_{3}

, and

v_{4}

measured for jets in

Pb + Pb

collisions at

\sqrt{s_{NN}} = 5.02

TeV using the ATLAS detector at the LHC. The measurement uses data collected in 2015 and 2018, corresponding to an integrated luminosity of 2.2

{nb}^{- 1}

. The

v_{n}

values are measured as a function of the transverse momentum of the jets between 71 and 398 GeV and the event centrality. A nonzero value of

v_{2}

is observed in all but the most central collisions. The value of

v_{2}

is largest for jets with lower transverse momentum, with values up to 0.05 in mid-central collisions. A smaller, nonzero value of

v_{3}

of approximately 0.01 is measured with no significant dependence on jet

p_{T}

or centrality, suggesting that fluctuations in the initial state play a small but distinct role in jet energy loss. No significant deviation of

v_{4}

from zero is observed in the measured kinematic region.

Note:

41 pages in total, author list starting page 26, 13 figures, 0 tables, submitted to PRC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2020-09

angular distribution: anisotropy
jet: production
heavy ion: scattering
jet: transverse momentum
path length: dependence
jet: energy loss
initial state: fluctuation
quark gluon: plasma
jet: yield
ATLAS

References(49)

Figures(29)

[1]

Heavy Ion Collisions: The Big Picture, and the Big Questions

Wit Busza
(
- MIT, LNS
)
,
Krishna Rajagopal
(
- MIT, LNS and
- MIT, Cambridge, CTP
)
,
Wilke van der Schee
(
- MIT, Cambridge, CTP and
- Utrecht U.
)

- Ann.Rev.Nucl.Part.Sci. 68 (2018) 339-376
•
e-Print:
- 1802.04801
•
DOI:
- 10.1146/annurev-nucl-101917-020852

[2]

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

[3]

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

[4]

Jet quenching and azimuthal anisotropy of large p(T) spectra in noncentral high-energy heavy ion collisions

Xin-Nian Wang
(
- LBL, Berkeley
)

- Phys.Rev.C 63 (2001) 054902
•
e-Print:
- nucl-th/0009019
•
DOI:
- 10.1103/PhysRevC.63.054902

[5]

High p(T) azimuthal asymmetry in noncentral A+A at RHIC

M. Gyulassy
(
- Columbia U. and
- LBL, Berkeley
)
,
I. Vitev
(
- Columbia U.
)
,
X.N. Wang
(
- LBL, Berkeley
)

- Phys.Rev.Lett. 86 (2001) 2537-2540
•
e-Print:
- nucl-th/0012092
•
DOI:
- 10.1103/PhysRevLett.86.2537

[6]

The Azimuthal asymmetry at large p(t) seem to be too large for a `jet quenching'

E.V. Shuryak
(
- SUNY, Stony Brook
)

- Phys.Rev.C 66 (2002) 027902
•
e-Print:
- nucl-th/0112042
•
DOI:
- 10.1103/PhysRevC.66.027902

[7]

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

[8]

Azimuthal anisotropy of $\pi^0$ and $\eta$ mesons in Au + Au collisions at $\sqrt{{s}_{NN}} =$ 200 GeV

PHENIX

Collaboration

•

A. Adare
(
- Colorado U.
)

et al.

- Phys.Rev.C 88 (2013) 6, 064910
•
e-Print:
- 1309.4437
•
DOI:
- 10.1103/PhysRevC.88.064910

[9]

Azimuthal anisotropy in Au+Au collisions at s(NN)**(1/2) = 200-GeV

STAR

Collaboration

•

J. Adams
(
- Birmingham U.
)

et al.

- Phys.Rev.C 72 (2005) 014904
•
e-Print:
- nucl-ex/0409033
•
DOI:
- 10.1103/PhysRevC.72.014904

[10]

Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb+Pb Collisions at $\sqrt{s_{NN}}=$ 2.76 TeV with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Rev.Lett. 111 (2013) 15, 152301
•
e-Print:
- 1306.6469
•
DOI:
- 10.1103/PhysRevLett.111.152301

[11]

Azimuthal anisotropy of charged jet production in $\sqrt{s_{\rm NN}}$ = 2.76 TeV Pb-Pb collisions

ALICE

Collaboration

•

Jaroslav Adam
(
- Prague, Tech. U.
)

et al.

- Phys.Lett.B 753 (2016) 511-525
•
e-Print:
- 1509.07334
•
DOI:
- 10.1016/j.physletb.2015.12.047

[12]

Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/ c in PbPb collisions at $\sqrt {s}_{{NN}}$ =5.02 TeV

CMS

Collaboration

•

A.M. Sirunyan

et al.

- Phys.Lett.B 776 (2018) 195-216
•
e-Print:
- 1702.00630
•
DOI:
- 10.1016/j.physletb.2017.11.041

[13]

Measurement of the azimuthal anisotropy of charged particles produced in $\sqrt{s_{_\text {NN}}}$ = 5.02 TeV Pb+Pb collisions with the ATLAS detector

ATLAS

Collaboration

•

Morad Aaboud
(
- Oujda U.
)

et al.

- Eur.Phys.J.C 78 (2018) 12, 997
•
e-Print:
- 1808.03951
•
DOI:
- 10.1140/epjc/s10052-018-6468-7

[14]

Event-by-event hydrodynamics $+$ jet energy loss: A solution to the $R_{AA} \otimes v_2$ puzzle

Jacquelyn Noronha-Hostler
(
- Houston U.
)
,
Barbara Betz
(
- Frankfurt U.
)
,
Jorge Noronha
(
- Sao Paulo U.
)
,
Miklos Gyulassy
(
- LBNL, NSD and
- Columbia U. and
- CCNU, Wuhan, Inst. Part. Phys.
)

- Phys.Rev.Lett. 116 (2016) 25, 252301
•
e-Print:
- 1602.03788
•
DOI:
- 10.1103/PhysRevLett.116.252301

[15]

Cumulants and nonlinear response of high $p_T$ harmonic flow at $\sqrt{s_{NN}}=5.02$ TeV

Barbara Betz
(
- Bonn, Max Planck Inst., Radioastron.
)
,
Miklos Gyulassy
(
- LBNL, NSD and
- Columbia U. and
- CCNU, Wuhan, Inst. Part. Phys.
)
,
Matthew Luzum
(
- Sao Paulo U.
)
,
Jorge Noronha
(
- Sao Paulo U.
)
,
Jacquelyn Noronha-Hostler
(
- Houston U.
)

et al.

- Phys.Rev.C 95 (2017) 4, 044901
•
e-Print:
- 1609.05171
•
DOI:
- 10.1103/PhysRevC.95.044901

[16]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[17]

The ATLAS Experiment at the CERN Large Hadron Collider

ATLAS

Collaboration

•

G. Aad
(
- Marseille, CPPM
)

et al.

- JINST 3 (2008) S08003
•
DOI:
- 10.1088/1748-0221/3/08/S08003

[18]

The ATLAS Collaboration Software and Firmware, ATL-SOFT-PUB-2021-001, 2021, https://cds.cern.ch/record/2767187

[19]

ATLAS Insertable B-Layer: Technical Design Report, ATLAS-TDR-19; CERN-LHCC-2010-013, 2010, https://cds.cern.ch/record/1291633, Addendum: ATLAS-TDR-19-ADD-1; CERN-LHCC-2012-009, 2012, https://cds.cern.ch/record/1451888

[20]