This article presents the first measurement of the differential Z-boson production cross-section in the forward region using proton-lead collisions with the LHCb detector. The dataset was collected at a nucleon-nucleon centre-of-mass energy of sNN = 8.16 TeV in 2016, corresponding to an integrated luminosity of 30.8 nb−1. The forward-backward ratio and the nuclear modification factors are measured together with the differential cross-section as functions of the Z boson rapidity in the centre-of-mass frame, the transverse momentum of the Z boson and a geometric variable ϕ*. The results are in good agreement with the predictions from nuclear parton distribution functions, providing strong constraining power at small Bjorken-x.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Measurement of the Z boson production cross-section in proton-lead collisions at sNN−−−√ = 8.16 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6) [10.1007/JHEP06(2023)022].

Measurement of the Z boson production cross-section in proton-lead collisions at sNN−−−√ = 8.16 TeV

Borsato, M.;Calvi, M.;Capelli, S.;Carniti, P.;Fazzini, D.;Garcia Pardinas, J.;Gotti, C.;Martinazzoli, L.;Martinelli, M.;Minotti, A.;Petruzzo, M.;Pizzichemi, M.;Salomoni, M.;Shields, E. B.;
2023

Abstract

This article presents the first measurement of the differential Z-boson production cross-section in the forward region using proton-lead collisions with the LHCb detector. The dataset was collected at a nucleon-nucleon centre-of-mass energy of sNN = 8.16 TeV in 2016, corresponding to an integrated luminosity of 30.8 nb−1. The forward-backward ratio and the nuclear modification factors are measured together with the differential cross-section as functions of the Z boson rapidity in the centre-of-mass frame, the transverse momentum of the Z boson and a geometric variable ϕ*. The results are in good agreement with the predictions from nuclear parton distribution functions, providing strong constraining power at small Bjorken-x.
Articolo in rivista - Articolo scientifico
Electroweak Interaction; Heavy Ion Experiments; Heavy-Ion Collision;
English
5-giu-2023
2023
2023
6
22
open
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Measurement of the Z boson production cross-section in proton-lead collisions at sNN−−−√ = 8.16 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6) [10.1007/JHEP06(2023)022].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/422458
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