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.

Measurement of the Z boson production cross-section in proton-lead collisions at $ \sqrt{s_{\textrm{NN}}} $ = 8.16 TeV [Measurement of the Z boson production cross-section in proton-lead collisions at √ˢNN = 8.16 TeV] / R. Aaij, A.S.W.A.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:6(2023 Jun 05), pp. 22.1-22.37. [10.1007/JHEP06(2023)022]

Measurement of the Z boson production cross-section in proton-lead collisions at $ \sqrt{s_{\textrm{NN}}} $ = 8.16 TeV [Measurement of the Z boson production cross-section in proton-lead collisions at √ˢNN = 8.16 TeV]

M. Lazzaroni;D. Marangotto;A. Merli;N. Neri;M. Petruzzo;E. Spadaro Norella;G. Tonani;
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.
Electroweak Interaction; Heavy Ion Experiments; Heavy-Ion Collision;
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
5-giu-2023
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1025058
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