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Article
Report number arXiv:2308.12940 ; LHCb-PAPER-2023-010 ; CERN-EP-2023-141 ; LHCB-PAPER-2023-010
Title Measurement of the Z boson production cross-section in pp collisions at s=5.02 TeV
Author(s) LHCb Collaboration  Показване на всичките 1105 автора
Corporate Author(s) LHCb Collaboration
Publication 2024-02-13
Imprint 23 Feb 2024
Number of pages 38
Note All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-010.html (LHCb public pages)
In: JHEP 2402 (2024) 070
DOI 10.1007/JHEP02(2024)070 (publication)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Abstract The first measurement of the Z boson production cross-section at centre-of-mass energy s=5.02TeV in the forward region is reported, using pp collision data collected by the LHCb experiment in year 2017, corresponding to an integrated luminosity of 100±2pb1. The production cross-section is measured for final-state muons in the pseudorapidity range 2.0<η<4.5 with transverse momentum pT>20GeV/c. The integrated cross-section is determined to be σZμ+μ=39.6±0.7(stat)±0.6(syst)±0.8(lumi) pb for the di-muon invariant mass in the range 60<Mμμ<120GeV/c2. This result and the differential cross-section results are in good agreement with theoretical predictions at next-to-next-to-leading order in the strong coupling. Based on a previous LHCb measurement of the Z boson production cross-section in pPb collisions at sNN=5.02 TeV, the nuclear modification factor RpPb is measured for the first time at this energy. The measured values are 1.2+0.50.3(stat)±0.1(syst) in the forward region (1.53<yμ<4.03) and 3.6+1.60.9(stat)±0.2(syst) in the backward region (4.97<yμ<2.47), where yμ represents the muon rapidity in the centre-of-mass frame.
Copyright/License Preprint: © 2023-2024 CERN (License: CC-BY-4.0)
Publication: © 2024 The Authors (License: CC-BY-4.0), sponsored by SCOAP³



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Email contact: lhcb.secretariat@cern.ch


 Записът е създаден на 2024-02-23, последна промяна на 2024-10-18


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