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



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 1020 more authors) (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).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>This article presents the first measurement of the differential <jats:italic>Z</jats:italic>-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 <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s_{\textrm{NN}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 8<jats:italic>.</jats:italic>16 TeV in 2016, corresponding to an integrated luminosity of 30<jats:italic>.</jats:italic>8 nb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The forward-backward ratio and the nuclear modification factors are measured together with the differential cross-section as functions of the <jats:italic>Z</jats:italic> boson rapidity in the centre-of-mass frame, the transverse momentum of the <jats:italic>Z</jats:italic> boson and a geometric variable <jats:italic>ϕ</jats:italic><jats:sup>*</jats:sup>. The results are in good agreement with the predictions from nuclear parton distribution functions, providing strong constraining power at small Bjorken-<jats:italic>x</jats:italic>.</jats:p>

Item Type: Article
Uncontrolled Keywords: Electroweak Interaction, Heavy Ion Experiments, Heavy-Ion Collision
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 24 Jul 2023 14:30
Last Modified: 18 Sep 2023 08:48
DOI: 10.1007/jhep06(2023)022
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3171849