Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

The ALICE Collaboration, S. Acharya, E. J. Brucken, B. Chang, D. J. Kim, V. Litichevskyi, M. M. Mieskolainen, R. Orava, J. Rak, S. S. Räsänen, S. Saarinen, M. Slupecki, T. W. Snellman, W. H. Trzaska, M. Vargyas, J. Viinikainen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The production of Z(0) bosons at large rapidities in Pb-Pb collisions at root s(NN) = 5.02 TeV is reported. Z(0) candidates are reconstructed in the dimuon decay channel (Z(0) -> mu(+) mu(-)), based on muons selected with pseudo-rapidity -4.0 < eta < -2.5 and p(T) > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of R-AA for the 0-20% central Pb-Pb collisions is 0.67 +/- 0.11(stat.) +/- 0.03 (syst.) f 0.06(corr. syst.), exhibiting a deviation of 2.6 sigma from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3 sigma in the 0-90% centrality class and by 3 sigma in the 0-20% central collisions. (C) 2018 The Author(s). Published by Elsevier B.V.

Original languageEnglish
JournalPhysics Letters B
Volume780
Pages (from-to)372-383
Number of pages12
ISSN0370-2693
DOIs
Publication statusPublished - 10 May 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • PRODUCTION CROSS-SECTIONS
  • HEAVY-ION COLLISIONS
  • Z-BOSON PRODUCTION
  • PP COLLISIONS
  • P(P)OVER-BAR COLLISIONS
  • ATLAS DETECTOR
  • COLLIDER
  • LHC

Cite this

The ALICE Collaboration ; Acharya, S. ; Brucken, E. J. ; Chang, B. ; Kim, D. J. ; Litichevskyi, V. ; Mieskolainen, M. M. ; Orava, R. ; Rak, J. ; Räsänen, S. S. ; Saarinen, S. ; Slupecki, M. ; Snellman, T. W. ; Trzaska, W. H. ; Vargyas, M. ; Viinikainen, J. / Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV. In: Physics Letters B. 2018 ; Vol. 780. pp. 372-383.
@article{95609c5af80d4efea96ddfcab0fdb53c,
title = "Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV",
abstract = "The production of Z(0) bosons at large rapidities in Pb-Pb collisions at root s(NN) = 5.02 TeV is reported. Z(0) candidates are reconstructed in the dimuon decay channel (Z(0) -> mu(+) mu(-)), based on muons selected with pseudo-rapidity -4.0 < eta < -2.5 and p(T) > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of R-AA for the 0-20{\%} central Pb-Pb collisions is 0.67 +/- 0.11(stat.) +/- 0.03 (syst.) f 0.06(corr. syst.), exhibiting a deviation of 2.6 sigma from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3 sigma in the 0-90{\%} centrality class and by 3 sigma in the 0-20{\%} central collisions. (C) 2018 The Author(s). Published by Elsevier B.V.",
keywords = "114 Physical sciences, PRODUCTION CROSS-SECTIONS, HEAVY-ION COLLISIONS, Z-BOSON PRODUCTION, PP COLLISIONS, P(P)OVER-BAR COLLISIONS, ATLAS DETECTOR, COLLIDER, LHC",
author = "{The ALICE Collaboration} and S. Acharya and Brucken, {E. J.} and B. Chang and Kim, {D. J.} and V. Litichevskyi and Mieskolainen, {M. M.} and R. Orava and J. Rak and R{\"a}s{\"a}nen, {S. S.} and S. Saarinen and M. Slupecki and Snellman, {T. W.} and Trzaska, {W. H.} and M. Vargyas and J. Viinikainen",
year = "2018",
month = "5",
day = "10",
doi = "10.1016/j.physletb.2018.03.010",
language = "English",
volume = "780",
pages = "372--383",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier",

}

The ALICE Collaboration, Acharya, S, Brucken, EJ, Chang, B, Kim, DJ, Litichevskyi, V, Mieskolainen, MM, Orava, R, Rak, J, Räsänen, SS, Saarinen, S, Slupecki, M, Snellman, TW, Trzaska, WH, Vargyas, M & Viinikainen, J 2018, 'Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV', Physics Letters B, vol. 780, pp. 372-383. https://doi.org/10.1016/j.physletb.2018.03.010

Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV. / The ALICE Collaboration; Acharya, S.; Brucken, E. J.; Chang, B.; Kim, D. J.; Litichevskyi, V.; Mieskolainen, M. M.; Orava, R.; Rak, J.; Räsänen, S. S.; Saarinen, S.; Slupecki, M.; Snellman, T. W.; Trzaska, W. H.; Vargyas, M.; Viinikainen, J.

In: Physics Letters B, Vol. 780, 10.05.2018, p. 372-383.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

AU - The ALICE Collaboration

AU - Acharya, S.

AU - Brucken, E. J.

AU - Chang, B.

AU - Kim, D. J.

AU - Litichevskyi, V.

AU - Mieskolainen, M. M.

AU - Orava, R.

AU - Rak, J.

AU - Räsänen, S. S.

AU - Saarinen, S.

AU - Slupecki, M.

AU - Snellman, T. W.

AU - Trzaska, W. H.

AU - Vargyas, M.

AU - Viinikainen, J.

PY - 2018/5/10

Y1 - 2018/5/10

N2 - The production of Z(0) bosons at large rapidities in Pb-Pb collisions at root s(NN) = 5.02 TeV is reported. Z(0) candidates are reconstructed in the dimuon decay channel (Z(0) -> mu(+) mu(-)), based on muons selected with pseudo-rapidity -4.0 < eta < -2.5 and p(T) > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of R-AA for the 0-20% central Pb-Pb collisions is 0.67 +/- 0.11(stat.) +/- 0.03 (syst.) f 0.06(corr. syst.), exhibiting a deviation of 2.6 sigma from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3 sigma in the 0-90% centrality class and by 3 sigma in the 0-20% central collisions. (C) 2018 The Author(s). Published by Elsevier B.V.

AB - The production of Z(0) bosons at large rapidities in Pb-Pb collisions at root s(NN) = 5.02 TeV is reported. Z(0) candidates are reconstructed in the dimuon decay channel (Z(0) -> mu(+) mu(-)), based on muons selected with pseudo-rapidity -4.0 < eta < -2.5 and p(T) > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of R-AA for the 0-20% central Pb-Pb collisions is 0.67 +/- 0.11(stat.) +/- 0.03 (syst.) f 0.06(corr. syst.), exhibiting a deviation of 2.6 sigma from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3 sigma in the 0-90% centrality class and by 3 sigma in the 0-20% central collisions. (C) 2018 The Author(s). Published by Elsevier B.V.

KW - 114 Physical sciences

KW - PRODUCTION CROSS-SECTIONS

KW - HEAVY-ION COLLISIONS

KW - Z-BOSON PRODUCTION

KW - PP COLLISIONS

KW - P(P)OVER-BAR COLLISIONS

KW - ATLAS DETECTOR

KW - COLLIDER

KW - LHC

U2 - 10.1016/j.physletb.2018.03.010

DO - 10.1016/j.physletb.2018.03.010

M3 - Article

VL - 780

SP - 372

EP - 383

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

ER -