TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
AU  - Zhuo, J.
PY  - 2024
DA  - 2024//
TI  - Measurement of the Z boson production cross-section in pp collisions at √s=5.02 TeV
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 070
EP  - 38pp
VL  - 02
IS  - 2
PB  - Springer
KW  - Electroweak Interaction
KW  - Hadron-Hadron Scattering
KW  - QCD
AB  - The first measurement of the Z boson production cross-section at centre-of-mass energy v 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 +/- 2 pb-1. The production cross-section is measured for final-state muons in the pseudorapidity range 2.0 <. < 4.5 with transverse momentum pT > 20 GeV/c. The integrated cross-section is determined to be sZ.mu+mu- = 39.6 +/- 0.7(stat) +/- 0.6(syst) +/- 0.8(lumi) pb for the di-muon invariant mass in the range 60 < M μμ< 120 GeV/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 constant. Based on a previous LHCb measurement of the Z boson production cross-section in pPb collisions at v sNN = 5.02TeV, the nuclear modification factor RpPb is measured for the first time at this energy. The measured values are 1.2+0.5 -0.3(stat) +/- 0.1(syst) in the forward region (1.53 < y* μ< 4.03) and 3.6+1.6 -0.9(stat)+/- 0.2(syst) in the backward region (-4.97 < y* μ< -2.47), where y* μrepresents the muon rapidity in the centre-of-mass frame.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2308.12940
UR  - https://doi.org/10.1007/JHEP02(2024)070
DO  - 10.1007/JHEP02(2024)070
LA  - English
N1  - WOS:001164932500001
ID  - LHCbCollaborationAaij_etal2024
ER  -