Measurement of Z<SUP>0</SUP>-boson production at large rapidities in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV



Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU, Aiola, S
et al (show 976 more authors) (2018) Measurement of Z<SUP>0</SUP>-boson production at large rapidities in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV. PHYSICS LETTERS B, 780. pp. 372-383.

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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.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 18 Feb 2019 17:56
Last Modified: 20 Jun 2024 19:04
DOI: 10.1016/j.physletb.2018.03.010
Open Access URL: https://doi.org/10.1016/j.physletb.2018.03.010
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3033065