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ATLAS_Collaboration_Measurement_of_the_production_of_a_W_boson_in_association_with_a_charm_quark_etc.pdf (1.77 MB)

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

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posted on 2023-06-08, 21:41 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Z J Grout, I Santoyo Castillo, Fabrizio SalvatoreFabrizio Salvatore, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
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 sv = 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+0.26-0.30 at Q 2 = 1.9 GeV2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio s(W + +c¯¯)/s(W - + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-s¯¯¯ quark asymmetry.

Funding

Consolidated Grant; G0927; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/K001329/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Verlag

Issue

5

Volume

2014

Article number

a68

Department affiliated with

  • Physics and Astronomy Publications

Notes

Part of the ATLAS collaboration

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-07-17

First Open Access (FOA) Date

2015-07-17

First Compliant Deposit (FCD) Date

2015-07-17

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