Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1007/JHEP05(2014)068

Scientific article

English

Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector

Contributors

ATLAS Collaboration

Published in

The journal of high energy physics, vol. 1405, p. 068-135

Collection

Open Access - SCOAP3

Publication date

2014

Abstract

The production of a W boson in association with a single charm quark is studied using 4.6 fb −1 of pp collision data at √s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W -boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be $ 0.96_{-0.30}^{+0.26 } $ at Q 2 = 1.9 GeV 2 , which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ ( W + + $ \overline{c} $ )/ σ ( W − + c ) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the $ s-\overline{s} $ quark asymmetry.

Keywords

Electroweak interaction
Hadron-Hadron Scattering
Charm physics

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

ATLAS Collaboration. Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector. In: The journal of high energy physics, 2014, vol. 1405, p. 068–135. doi: 10.1007/JHEP05(2014)068

Article (Published version)

CC BY

Identifiers

PID : unige:55801
DOI : 10.1007/JHEP05(2014)068
arXiv : 1402.6263

Journal ISSN

1029-8479

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220downloads

Creation

27/04/2015 10:31:29

First validation

27/04/2015 10:31:29

Update

13/10/2025 21:30:58

Status update

14/03/2023 23:13:38

Last indexation

10/11/2026 17:17:47

Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector

Contributors

Collaborators

Published in

Collection

Publication date

Abstract

Keywords

UNIGE affiliation entities

Citation (ISO format)

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Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation