Measurements of the associated production of a W boson and a charm quark in proton-proton collisions at s = 8 TeV .

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Trevisani F Wang R Xiao W Xie T Cheng J DolenN ParasharA Baty S Dildick K M EcklundS FreedF J M Geurts M Kilpatrick A KumarW LiB P PadleyR RedjimiJ RobertsJ RorieW Shi A G Stahl Leiton A BodekP de BarbaroR Demina J L DulembaC FallonT FerbelM GalantiA Garcia-Bellido O HindrichsA KhukhunaishviliE RankenR TausB ChiaritoJ P Chou A Gandrakota Y Gershtein E HalkiadakisA HartM HeindlE HughesS KaplanO KarachebanI LaflotteA LathR MontalvoK NashM OshersonS SalurS SchnetzerS SomalwarR StoneS A ThayilS ThomasH WangH AcharyaA G Delannoy S Spanier O Bouhali M Dalchenko A DelgadoR EusebiJ GilmoreT HuangT KamonH Kim S LuoS MalhotraR MuellerD OvertonL Perniè D Rathjens A Safonov J SturdyN AkchurinJ DamgovV HegdeS KunoriK LamichhaneS W LeeT MengkeS Muthumuni T PeltolaS UndleebI VolobouevZ WangA WhitbeckE AppeltS GreeneA GurrolaR JanjamW JohnsC MaguireA MeloH NiK Padeken F Romeo P SheldonS TuoJ Velkovska M Verweij M W Arenton B Cox G Cummings J Hakala R Hirosky M Joyce A LedovskoyA LiC Neu B TannenwaldY WangE WolfeF XiaP E KarchinN PoudyalP ThapaK Black T Bose J BuchananC CaillolS Dasu I De Bruyn P EveraertsC GalloniH HeM HerndonA HervéU HussainA LanaroA LoeligerR LovelessJ Madhusudanan SreekalaA MallampalliD PinnaT RugglesA SavinV ShangV Sharma W H SmithD TeagueS Trembath-ReichertW Vetensnull null

Published in: The European physical journal. C, Particles and fields (2022)

Measurements of the associated production of a W boson and a charm ( c ) quark in proton-proton collisions at a centre-of-mass energy of 8 TeV are reported. The analysis uses a data sample corresponding to a total integrated luminosity of 19.7 fb - 1 collected by the CMS detector at the LHC. The W bosons are identified through their leptonic decays to an electron or a muon, and a neutrino. Charm quark jets are selected using distinctive signatures of charm hadron decays. The product of the cross section and branching fraction σ ( pp → W + c + X ) B ( W → ℓ ν ) , where ℓ = e or μ , and the cross section ratio σ ( pp → W + + c ¯ + X ) / σ ( pp → W - + c + X ) are measured in a fiducial volume and differentially as functions of the pseudorapidity and of the transverse momentum of the lepton from the W boson decay. The results are compared with theoretical predictions. The impact of these measurements on the determination of the strange quark distribution is assessed.

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