Constraints for the nuclear parton distributions from Z and W production at the LHC

Abstract

The LHC is foreseen to finally bring also the nuclear collisions to the TeV scale thereby providing new possibilities for physics studies, in particular related to the electro-weak sector of the Standard Model. We study here the Z and W production in proton-lead and lead-lead collisions at the LHC, concentrating on the prospects of testing the factorization and constraining the nuclear modifications of the parton distribution functions (PDFs). Especially, we find that the rapidity asymmetries in proton-nucleus collisions, arising from the differences in the PDFs between the colliding objects, provide a decisive advantage in comparison to the rapidity-symmetric nucleus-nucleus case. We comment on how such studies will help to improve our knowledge of the nuclear PDFs.

The version accepted for publication in JHEP. New figures has been added, and we also discuss the single charged lepton production

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• Measurement of photonuclear jet production in ultra-peripheral Pb+Pb collisions at $\sqrt{s_{\text{NN}}}=5.02$ TeV with the ATLAS detector
• Measurement of Z${}^0$-boson production at large rapidities in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
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• The physics potential of proton-nucleus collisions at the TeV scale
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• Quenching of light hadron spectra in pA collisions from fully coherent energy loss
• Probing Shadowed Nuclear Sea with Massive Gauge Bosons in the Future Heavy-Ion Collisions
• Scaling properties of inclusive W${}^{\pm }$ production at hadron colliders
• W${}^{\pm }$-boson production in p$-$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV and PbPb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• W, Z and photon production in CMS
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• LHC lead data and nuclear PDFs
• Electroweak-boson production in p-Pb and Pb-Pb collisions at the LHC with ALICE
• Measurement of electroweak-boson production in Pb--Pb and p--Pb collisions at the LHC with ALICE
• Dimuons in pp and PbPb collisions with the CMS experiment
• Investigations of $p$+Pb Collisions at Perturbative and Non-Perturbative QCD Scales