Measurements of the associated production of a W boson and a charm quark in proton–proton collisions at $\sqrt{s}=8\,\text {TeV} $ - INSPIRE

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Measurements of the associated production of a W boson and a charm quark in proton–proton collisions at $\sqrt{s}=8\,\text {TeV}$

CMS

Collaboration

Dec 1, 2021

52 pages

Published in:

Eur.Phys.J.C 82 (2022) 12, 1094

Published: Dec 5, 2022

e-Print:

2112.00895 [hep-ex]

DOI:

10.1140/epjc/s10052-022-10897-7

Report number:

CMS-SMP-18-013,
CERN-EP-2021-206

Experiments:

CERN-LHC-CMS,
CERN-LHC-CMS

View in:

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Abstract: (Springer)

Measurements of the associated production of a W boson and a charm (

{\text {c}}

) quark in proton–proton collisions at a centre-of-mass energy of 8

\,\text {TeV}

are reported. The analysis uses a data sample corresponding to a total integrated luminosity of 19.7

\,\text {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 \sigma (\text {p}\text {p}\rightarrow \text {W}+ {\text {c}}+ \text {X}) {\mathcal {B}}(\text {W}\rightarrow \ell \upnu ), where

\ell = \text {e}

or \upmu , and the cross section ratio

\sigma (\text {p}\text {p}\rightarrow {{\text {W}}^{+} + \bar{{\text {c}}} + \text {X}}) / \sigma (\text {p}\text {p}\rightarrow {{\text {W}}^{-} + {\text {c}}+ \text {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.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-18-013 (CMS Public Pages)

p p: colliding beams
W: associated production
charm: associated production
p p: scattering
lepton: transverse momentum
quark: jet
jet: charm
charm: particle identification
W: leptonic decay
cross section: ratio: measured

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