Journal article
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
The journal of high energy physics, Vol.2014(5), 68
01/01/2014
DOI: 10.1007/JHEP05(2014)068
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.
Details
- Title: Subtitle
- 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
- Creators
- ATLAS Collaboration
- Contributors
- U Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- The journal of high energy physics, Vol.2014(5), 68
- DOI
- 10.1007/JHEP05(2014)068
- ISSN
- 1126-6708
- eISSN
- 1029-8479
- Language
- English
- Date published
- 01/01/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199695302771
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