Franconi, Laura; Haug, Sigve; Weber, Michele; Anders, John Kenneth; Fehr, Armin; Beck, Hans Peter; Ereditato, Antonio; Miucci, Antonio; Weston, Thomas Daniel (2020). ℤ boson production in Pb+Pb collisions at \sqrts\textrmNN= 5.02 TeV measured by the ATLAS experiment. Physics letters. B, 802(135262), p. 135262. Elsevier 10.1016/j.physletb.2020.135262
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The production yield of Z bosons is measured in the electron and muon decay channels in Pb+Pb collisions at TeV with the ATLAS detector. Data from the 2015 LHC run corresponding to an integrated luminosity of 0.49 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.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 08 Faculty of Science > Physics Institute |
UniBE Contributor: |
Franconi, Laura, Haug, Sigve, Weber, Michele, Anders, John Kenneth, Ilg, Armin, Beck, Hans Peter, Ereditato, Antonio, Miucci, Antonio, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0370-2693 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
30 Apr 2021 18:03 |
Last Modified: |
02 Mar 2023 23:34 |
Publisher DOI: |
10.1016/j.physletb.2020.135262 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.48350/155597 |
URI: |
https://boris.unibe.ch/id/eprint/155597 |
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