Pseudorapidity distributions of charged hadrons in lead-lead collisions at <math altimg="si1.svg"><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><msub><mrow/><mrow><mi mathvariant="normal">NN</mi></mrow></msub></mrow></msub></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>5.36</mn><mspace width="0.25em"/><mtext>TeV</mtext></math> - INSPIRE

Pseudorapidity distributions of charged hadrons in lead-lead collisions at $\sqrt{s_{_{NN}}} = 5.36 TeV$

CMS

Collaboration

Sep 1, 2024

25 pages

Published in:

Phys.Lett.B 861 (2025) 139279

Published: Jan 20, 2025

e-Print:

2409.00838 [hep-ex]

DOI:

10.1016/j.physletb.2025.139279 (publication)

Report number:

CMS-HIN-23-007,
CERN-EP-2024-118

Experiments:

CERN-LHC-CMS

View in:

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Abstract: (Elsevier B.V.)

The pseudorapidity (η) distributions of charged hadrons are measured using data collected at the highest ever nucleon-nucleon center-of-mass energy of

\sqrt{s_{_{NN}}} = 5.36 TeV

for collisions of lead-lead ions. The data were recorded by the CMS experiment at the LHC in 2022 and correspond to an integrated luminosity of

0.30 \pm 0.03 {μ b}^{- 1}

. Using the CMS silicon pixel detector, the yields of primary charged hadrons produced in the range

| η | < 2.6

are reported. The evolution of the midrapidity particle density as a function of collision centrality is also reported. In the 5% most central collisions, the charged-hadron η density in the range

| η | < 0.5

is found to be

2032 \pm 91 (syst)

, with negligible statistical uncertainty. This result is consistent with an extrapolation from nucleus-nucleus collision data at lower center-of-mass energies. Comparisons are made to various Monte Carlo event generators and to previous measurements of lead-lead and xenon-xenon collisions at similar collision energies. These new data detail the dependence of particle production on the collision energy, initial collision geometry, and the size of the colliding nuclei.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-23-007 (CMS Public Pages)

CMS
Hadrons
Multiplicity
Spectra

References(62)

Figures(7)

[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]

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]

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

[4]

Gluon saturation and initial conditions for relativistic heavy ion collisions

- Prog.Part.Nucl.Phys. 76 (2014) 1-42
•
e-Print:
- 1401.4866
•
DOI:
- 10.1016/j.ppnp.2014.01.004

[5]

Hadron production in nuclear collisions at RHIC and high density QCD

Dmitri Kharzeev
(
- Brookhaven
)
,
Marzia Nardi
(
- Turin U. and
- INFN, Turin
)

- Phys.Lett.B 507 (2001) 121-128
•
e-Print:
- nucl-th/0012025
•
DOI:
- 10.1016/S0370-2693(01)00457-9

[6]

Constraints from the first LHC data on hadronic event generators for ultra-high energy cosmic-ray physics

David d'Enterria
(
- ICREA, Barcelona and
- ICC, Barcelona U. and
- CERN
)
,
Ralph Engel
(
- KIT, Karlsruhe
)
,
Tanguy Pierog
(
- KIT, Karlsruhe
)
,
Sergey Ostapchenko
(
- Norwegian U. Sci. Tech. and
- SINP, Moscow
)
,
Klaus Werner
(
- SUBATECH, Nantes
)

- Astropart.Phys. 35 (2011) 98-113
•
e-Print:
- 1101.5596
•
DOI:
- 10.1016/j.astropartphys.2011.05.002

[7]

System size, energy and centrality dependence of pseudorapidity distributions of charged particles in relativistic heavy ion collisions

PHOBOS

Collaboration

•

B. Alver
(
- Argonne
)

et al.

- Phys.Rev.Lett. 102 (2009) 142301
•
e-Print:
- 0709.4008
•
DOI:
- 10.1103/PhysRevLett.102.142301

[8]

Charged-particle pseudorapidity distributions in Au+Au collisions at $s(NN) ^{1/2}$ = 62.4-GeV

PHOBOS

Collaboration

•

B.B. Back
(
- Argonne
)

et al.

- Phys.Rev.C 74 (2006) 021901
•
e-Print:
- nucl-ex/0509034
•
DOI:
- 10.1103/PhysRevC.74.021901

[9]

Pseudorapidity distributions of charged particles from Au+Au collisions at the maximum RHIC energy

BRAHMS

Collaboration

•

I.G. Bearden
(
- Copenhagen U.
)

et al.

- Phys.Rev.Lett. 88 (2002) 202301
•
e-Print:
- nucl-ex/0112001
•
DOI:
- 10.1103/PhysRevLett.88.202301

[10]

Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 799 (2019) 135049
•
e-Print:
- 1902.03603
•
DOI:
- 10.1016/j.physletb.2019.135049

[11]

Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe–Xe collisions at $\sqrt{s_{\rm NN}}$ =5.44TeV

ALICE

Collaboration

•

Shreyasi Acharya
(
- Calcutta, VECC
)

et al.

- Phys.Lett.B 790 (2019) 35-48
•
e-Print:
- 1805.04432
•
DOI:
- 10.1016/j.physletb.2018.12.048

[12]

Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

ALICE

Collaboration

•

Kenneth Aamodt
(
- Bergen U.
)

et al.

- Phys.Rev.Lett. 106 (2011) 032301
•
e-Print:
- 1012.1657
•
DOI:
- 10.1103/PhysRevLett.106.032301

[13]

Dependence on pseudorapidity and centrality of charged hadron production in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 08 (2011) 141
•
e-Print:
- 1107.4800
•
DOI:
- 10.1007/JHEP08(2011)141

[14]

Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

ALICE

Collaboration

•

Jaroslav Adam
(
- Prague, Tech. U.
)

et al.

- Phys.Rev.Lett. 116 (2016) 22, 222302
•
e-Print:
- 1512.06104
•
DOI:
- 10.1103/PhysRevLett.116.222302

[15]

Gluon shadowing and hadron production in heavy-ion collisions at LHC

Wei-Tian Deng
(
- Shandong U. and
- Frankfurt U., FIAS
)
,
Xin-Nian Wang
(
- Hua-Zhong Normal U. and
- LBNL, NSD
)
,
Rong Xu
(
- Hua-Zhong Normal U.
)

- Phys.Lett.B 701 (2011) 133-136
•
e-Print:
- 1011.5907
•
DOI:
- 10.1016/j.physletb.2011.05.040

[16]

EPOS LHC: Test of collective hadronization with data measured at the CERN Large Hadron Collider

- Phys.Rev.C 92 (2015) 3, 034906
•
e-Print:
- 1306.0121
•
DOI:
- 10.1103/PhysRevC.92.034906

[17]

A Model of jet quenching in ultrarelativistic heavy ion collisions and high-p(T) hadron spectra at RHIC

I.P. Lokhtin
(
- Moscow State U.
)
,
A.M. Snigirev
(
- Moscow State U.
)

- Eur.Phys.J.C 45 (2006) 211-217
•
e-Print:
- hep-ph/0506189
•
DOI:
- 10.1140/epjc/s2005-02426-3

[18]

Transverse Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at $\sqrt{s} = 0.9$ and 2.36 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 02 (2010) 041
•
e-Print:
- 1002.0621
•
DOI:
- 10.1007/JHEP02(2010)041

[19]

Transverse-momentum and pseudorapidity distributions of charged hadrons in $pp$ collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.Lett. 105 (2010) 022002
•
e-Print:
- 1005.3299
•
DOI:
- 10.1103/PhysRevLett.105.022002

[20]

Charged Particle Multiplicities in $pp$ Interactions at $\sqrt{s}=0.9$ , 2.36, and 7 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 01 (2011) 079
•
e-Print:
- 1011.5531
•
DOI:
- 10.1007/JHEP01(2011)079

[21]

Measurement of pseudorapidity distributions of charged particles in proton-proton collisions at $\sqrt{s}$ = 8 TeV by the CMS and TOTEM experiments

CMS and
TOTEM

Collaborations

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Eur.Phys.J.C 74 (2014) 10, 3053
•
e-Print:
- 1405.0722
•
DOI:
- 10.1140/epjc/s10052-014-3053-6

[22]

Pseudorapidity distribution of charged hadrons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 751 (2015) 143-163
•
e-Print:
- 1507.05915
•
DOI:
- 10.1016/j.physletb.2015.10.004

[23]

Pseudorapidity distributions of charged hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 01 (2018) 045
•
e-Print:
- 1710.09355
•
DOI:
- 10.1007/JHEP01(2018)045

[24]

•
DOI:
- 10.17182/hepdata.153190

[25]

The CMS Experiment at the CERN LHC

CMS

Collaboration

•

S. Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 3 (2008) S08004
•
DOI:
- 10.1088/1748-0221/3/08/S08004

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