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.
UR - https://www.scopus.com/pages/publications/85044134122
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 -