The first measurement of the Z boson production cross-section at centre-of-mass energy sqrt(s) = 5.02 TeV 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 < η < 4.5 with transverse momentum pT> 20 GeV/c. The integrated cross-section is determined to be (Formula presented.) for the di-muon invariant mass in the range 60 < Mμμ< 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 sqrt(sNN) = 5.02 TeV, the nuclear modification factor RpPb is measured for the first time at this energy. The measured values are 1.2−0.3+0.5 (stat) ± 0.1(syst) in the forward region (1.53< 4.03) and 3.6−0.9+1.6 (stat) ± 0.2(syst) in the backward region (−4.97 < −2.47), where y_μ∗ represents the muon rapidity in the centre-of-mass frame.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of the Z boson production cross-section in pp collisions at s = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(2) [10.1007/JHEP02(2024)070].

Measurement of the Z boson production cross-section in pp collisions at s = 5.02 TeV

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Kirsebom V. S.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2024

Abstract

The first measurement of the Z boson production cross-section at centre-of-mass energy sqrt(s) = 5.02 TeV 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 < η < 4.5 with transverse momentum pT> 20 GeV/c. The integrated cross-section is determined to be (Formula presented.) for the di-muon invariant mass in the range 60 < Mμμ< 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 sqrt(sNN) = 5.02 TeV, the nuclear modification factor RpPb is measured for the first time at this energy. The measured values are 1.2−0.3+0.5 (stat) ± 0.1(syst) in the forward region (1.53< 4.03) and 3.6−0.9+1.6 (stat) ± 0.2(syst) in the backward region (−4.97 < −2.47), where y_μ∗ represents the muon rapidity in the centre-of-mass frame.
Articolo in rivista - Articolo scientifico
Electroweak Interaction; Hadron-Hadron Scattering; QCD;
English
13-feb-2024
2024
2024
2
70
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of the Z boson production cross-section in pp collisions at s = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(2) [10.1007/JHEP02(2024)070].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/491380
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