Measurement of the production of a W boson in association with a charm quark in pp collisions at $ \sqrt{s} $ = 7 TeV with the ATLAS detector
W boson , charm quark , hadron collisions
ratio: (strangeness down)
Teoría cuántica de campos
Quarks
parton: distribution function
cross section: ratio
W: leptonic decay
Atomic
01 natural sciences
7. Clean energy
Mathematical Sciences
510
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
Particle and Plasma Physics
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Electroweak interaction
Electroweak interaction; Hadron-Hadron Scattering; Charm physics
info:eu-repo/classification/ddc/530
Mathematical Physics
p p: interaction
QC
Charm physics
LHC; ATLAS; High Energy Physics
Quantum Physics
charm: particle identification
W+: hadroproduction
QC0170
higher-order: 1
Particle and High Energy Physics
ATLAS
Nuclear and Plasma Physics
Nuclear & Particles Physics
Settore FIS/01 - FISICA SPERIMENTALE
Nuclear and plasma physics
Dispersión (Física)
CERN LHC Coll
Particle and high energy physics
CHARM QUARK
Mathematical physics
7000 GeV-cms
Physical Sciences
Charm Physics
W-: hadroproduction
Nuclear and High Energy Physics
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Charm physics; Electroweak interaction; Hadron-Hadron scattering; Nuclear and High Energy Physics
FOS: Physical sciences
ddc:500.2
530
info:eu-repo/classification/ddc/500.2
charm: associated production
differential cross section: measured
elementary particles physics; electroweak interaction; hadron-hadron scattering; charm physics
lepton: rapidity
539
0103 physical sciences
Fysik
Nuclear
quantum chromodynamics: perturbation theory
W BOSON
quark: sea
Hadron-Hadron Scattering
hep-ex
Matemática física y química
500
Molecular
parametrization
Electroweak Interaction
Hadrones - Dispersión
QC Physics / fizika
Experimental High Energy Physics
Charm physics; Electroweak interaction; Hadron-Hadron scattering
p p --> W charm anything
experimental results
DOI:
10.1007/jhep05(2014)068
Publication Date:
2014-05-30T01:42:53Z
AUTHORS (2902)
ABSTRACT
52 pages plus author list (74 pages total), 16 figures, 11 tables, submitted to JHEP, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2012-14/<br/>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 sqrt(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 +0.26 -0.30 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 sigma(W^+ + bar{c})/sigma(W^- + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-bar{s} quark asymmetry.<br/>
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