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

ALICE Collaboration; H.A. Andrews; D. Evans; K.L. Graham; P.G. Jones; A. Jusko; M. Krivda; R. Lietava; O. Villalobos Baillie; E. Willsher; N. Zardoshti

doi:10.1016/j.physletb.2018.03.010

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

ALICE Collaboration, H.A. Andrews (Contributor), D. Evans (Contributor), K.L. Graham (Contributor), P.G. Jones (Contributor), A. Jusko (Contributor), M. Krivda (Contributor), R. Lietava (Contributor), O. Villalobos Baillie (Contributor), E. Willsher (Contributor), N. Zardoshti (Contributor)

Physics and Astronomy

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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 3σ in the 0–20% central collisions.

Original language	English
Pages (from-to)	372-383
Number of pages	12
Journal	Physics Letters B
Volume	780
Early online date	6 Mar 2018
DOIs	https://doi.org/10.1016/j.physletb.2018.03.010
Publication status	Published - 10 May 2018

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ALICE_Measurement_of_Z-boson_production_at_large_rapidities_Physics_Letters_B_2018
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@article{3259783555954081a7d41940b43ef15a,

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

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 3σ in the 0–20% central collisions.",

author = "{ALICE Collaboration} and S. Acharya and H.A. Andrews and D. Evans and K.L. Graham and P.G. Jones and A. Jusko and M. Krivda and R. Lietava and {Villalobos Baillie}, O. and E. Willsher and N. Zardoshti",

year = "2018",

month = may,

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",

}

TY - JOUR

T1 - Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at √sNN=5.02TeV

AU - ALICE Collaboration

AU - Acharya, S.

A2 - Andrews, H.A.

A2 - Evans, D.

A2 - Graham, K.L.

A2 - Jones, P.G.

A2 - Jusko, A.

A2 - Krivda, M.

A2 - Lietava, R.

A2 - Villalobos Baillie, O.

A2 - Willsher, E.

A2 - Zardoshti, N.

PY - 2018/5/10

Y1 - 2018/5/10

N2 - 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.

AB - 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.

U2 - 10.1016/j.physletb.2018.03.010

DO - 10.1016/j.physletb.2018.03.010

M3 - Article

SN - 0370-2693

VL - 780

SP - 372

EP - 383

JO - Physics Letters B

JF - Physics Letters B

ER -

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

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