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

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 $\sqrt{s_{\mathrm{NN}}}=8.16\mathrm{TeV}$ in 2016, corresponding to an integrated luminosity of $30.8{\mathrm{nb}}^{-1}$. 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 ${\varphi }^{\ast }$. The results are in good agreement with the predictions from nuclear parton distribution functions, providing strong constraining power at small Bjorken-$x$.

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)

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• LHAPDF6: parton density access in the LHC precision era
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• NLO vector-boson production matched with shower in POWHEG
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Optimisation of variables for studying dilepton transverse momentum distributions at hadron colliders
• A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders
• ABCDisCo: Automating the ABCD Method with Machine Learning

Cited by in corpus (1)

• Luminosity determination using Z boson production at the CMS experiment