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Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV

Acharya, S ; Adamova, D. ; Adolfsson, Jonatan LU ; Aggarwal, M.M ; Aglieri Rinella, G ; Agnello, M. ; Christiansen, Peter LU ; Oskarsson, Anders LU ; Richert, Tuva LU and Silvermyr, David LU orcid , et al. (2018) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 780. p.372-383
Abstract
The production of Z0 bosons at large rapidities in Pb–Pb collisions at sNN=5.02TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0→μ+μ−), based on muons selected with pseudo-rapidity −4.0<η<−2.5 and pT>20GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of RAA for the 0–20% central Pb–Pb collisions is 0.67±0.11(stat.)±0.03(syst.)±0.06(corr. syst.), exhibiting a deviation of 2.6σ 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 2.3σ in the 0–90% centrality class and by... (More)
The production of Z0 bosons at large rapidities in Pb–Pb collisions at sNN=5.02TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0→μ+μ−), based on muons selected with pseudo-rapidity −4.0<η<−2.5 and pT>20GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of RAA for the 0–20% central Pb–Pb collisions is 0.67±0.11(stat.)±0.03(syst.)±0.06(corr. syst.), exhibiting a deviation of 2.6σ 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 2.3σ in the 0–90% centrality class and by 3σ in the 0–20% central collisions. © 2018 The Author(s) (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
780
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:85044134122
ISSN
0370-2693
DOI
10.1016/j.physletb.2018.03.010
language
English
LU publication?
yes
additional info
Export Date: 3 April 2018
id
fe26425e-d596-43c7-9ad7-7885c518251a
date added to LUP
2018-04-03 13:05:49
date last changed
2023-07-25 13:38:33
@article{fe26425e-d596-43c7-9ad7-7885c518251a,
  abstract     = {{The production of Z0 bosons at large rapidities in Pb–Pb collisions at sNN=5.02TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0→μ+μ−), based on muons selected with pseudo-rapidity −4.0&lt;η&lt;−2.5 and pT&gt;20GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of RAA for the 0–20% central Pb–Pb collisions is 0.67±0.11(stat.)±0.03(syst.)±0.06(corr. syst.), exhibiting a deviation of 2.6σ 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 2.3σ in the 0–90% centrality class and by 3σ in the 0–20% central collisions. © 2018 The Author(s)}},
  author       = {{Acharya, S and Adamova, D. and Adolfsson, Jonatan and Aggarwal, M.M and Aglieri Rinella, G and Agnello, M. and Christiansen, Peter and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Stenlund, Evert and Vislavicius, Vytautas}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  pages        = {{372--383}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2018.03.010}},
  doi          = {{10.1016/j.physletb.2018.03.010}},
  volume       = {{780}},
  year         = {{2018}},
}