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Z boson production in Pb+Pb collisions at sNN=5.02 TeV measured by the ATLAS experiment

Aad G.
•
Abbott B.
•
Abbott D. C.
altro
Zwalinski L.
2020
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
The production yield of Z bosons is measured in the electron and muon decay channels in Pb+Pb collisions at sNN=5.02 TeV with the ATLAS detector. Data from the 2015 LHC run corresponding to an integrated luminosity of 0.49 nb−1 are used for the analysis. The Z boson yield, normalised by the total number of minimum-bias events and the mean nuclear thickness function, is measured as a function of dilepton rapidity and event centrality. The measurements in Pb+Pb collisions are compared with similar measurements made in proton–proton collisions at the same centre-of-mass energy. The nuclear modification factor is found to be consistent with unity for all centrality intervals. The results are compared with theoretical predictions obtained at next-to-leading order using nucleon and nuclear parton distribution functions. The normalised Z boson yields in Pb+Pb collisions lie 1–3σ above the predictions. The nuclear modification factor measured as a function of rapidity agrees with unity and is consistent with a next-to-leading-order QCD calculation including the isospin effect.
DOI
10.1016/j.physletb.2020.135262
Archivio
http://hdl.handle.net/11390/1176759
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85079047734
http://www.sciencedirect.com/science/journal/03702693
Diritti
open access
Scopus© citazioni
16
Data di acquisizione
Jun 7, 2022
Vedi dettagli
Web of Science© citazioni
23
Data di acquisizione
Mar 28, 2024
Visualizzazioni
2
Data di acquisizione
Apr 19, 2024
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