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

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

LHCb

Collaboration

May 20, 2022

32 pages

Published in:

JHEP 06 (2023) 022

Published: Jun 5, 2023

e-Print:

2205.10213 [hep-ex]

DOI:

10.1007/JHEP06(2023)022

Report number:

LHCb-PAPER-2022-009,
CERN-EP-2022-089

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Springer)

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

\sqrt{s_{\textrm{NN}}}

= 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.[graphic not available: see fulltext]

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-009.html (LHCb public pages)

Electroweak Interaction
Heavy Ion Experiments
Heavy-Ion Collision
parton: distribution function
Z0: hadroproduction
p nucleus: interaction
lead
Z0: transverse momentum
LHC-B
CERN LHC Coll

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