Measurement of the production cross section for a W boson in association with a charm quark in proton–proton collisions at √s = 13 TeV

(CMS Collaboration) Tumasyan, Armen; ..., ...; Giljanović, Duje; Godinović, Nikola; Lelas, Damir; Puljak, Ivica; Antunović, Željko; Kovač, Marko; Šćulac, Toni; Brigljević, Vuko; Chitroda, Bhakti Kanulal; Ferenček, Dinko; Mishra, Saswat; Roguljić, Matej; Starodumov, Andrey; Šuša, Tatjana; Bargassa, Pedrame; Đurić, Senka; ..., ...; Zhokin, Alexander (2024) Measurement of the production cross section for a W boson in association with a charm quark in proton–proton collisions at √s = 13 TeV. European Physical Journal C: Particles and Fields, 84 (1). ISSN 1434-6052

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Abstract

The strange quark content of the proton is probed through the measurement of the production cross section for a W boson and a charm (c) quark in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis uses a data sample corresponding to a total integrated luminosity of 138 fb−1 collected with 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 jets are tagged using the presence of a muon or a secondary vertex inside the jet. The W+c production cross section and the cross section ratio R±c = σ(W++c¯) / σ(W−+c) are measured inclusively and differentially as functions of the transverse momentum and the pseudorapidity of the lepton originating from the W boson decay. The precision of the measurements is improved with respect to previous studies, reaching 1% in R±c. The precision of the measurements is improved with respect to previous studies, reaching 1% in R±c = 0.950 ± 0.005 (stat) ± 0.010 (syst). The measurements are compared with theoretical predictions up to next-to-next-to-leading order in perturbative quantum chromodynamics.

Item Type:	Article
Uncontrolled Keywords:	High energy physics ; Experimental particle physics ; LHC ; CMS ; p p: scattering ; p p: colliding beams ; W: associated production ; charm: associated production ; lepton: rapidity ; lepton: transverse momentum ; cross section: ratio: measured ; jet: charm ; charm: particle identification ; vertex: secondary ; higher-order: 2 ; perturbation theory: higher-order ; muon ; quantum chromodynamics: perturbation theory ; electron ; CERN LHC Coll ; W: leptonic decay ; channel cross section: measured
Subjects:	NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Centre for detectors, sensors and electronics Division of Experimental Physics
Depositing User:	Ana Zečević
Date Deposited:	07 Oct 2024 13:34
URI:	http://fulir.irb.hr/id/eprint/9117
DOI:	10.1140/epjc/s10052-023-12258-4

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