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

The collaboration
JHEP 05 (2014) 068, 2014.

Abstract (data abstract)
CERN-LHC. 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 in 2011 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^+ + cbar)/sigma(W^- + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions on the s-sbar asymmetry.

• #### Table 1

Data from T 8, F 10

10.17182/hepdata.63197.v1/t1

Measured integrated cross sections of the production of a W boson with a single c-jet, a D meson or a...

• #### Table 2

Data from F 12

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Measured integrated cross section ratios of the production of W+ and W- bosons associated with a single c-jet, a D...

• #### Table 3

Data from F 13

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Measured differential cross sections as function of the lepton pseudo-rapidity of the production of a W boson with a single...

• #### Table 4

Data from F 13

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Measured differential cross sections as function of the lepton pseudo-rapidity of the production of a W boson with a D...

• #### Table 5

Data from T 10

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Measured cross section ratios of the production of a W boson with a D meson or a D* meson and...

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Data from F 15

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Measured differential cross section ratios of the production of a W boson with a D meson or a D* meson...

• #### Table 7

Data from T 11, F 16

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Measured integrated cross sections of the production of a W boson in association with a single c-jet and exactly zero...

• #### Table 8

Data from T 11, F 16

10.17182/hepdata.63197.v1/t8

Measured integrated cross sections ratio of the production of a W+ and W- bosons in association with a single c-jet...

• #### Table 9

Data from T 11

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Measured integrated cross sections of the production of a W boson in association with a single c-jet decaying into a...

• #### Table 10

Data from T 8, F 10

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Correlation matrix corresponding to the total uncertainties of measured integrated cross sections of the production of a W boson with...

• #### Table 11

Data from T 8, F 10

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Systematic uncertainties after the averaging procedure of the inclusive cross sections in different channels. The first row (labeled Uncorr.) represents...

• #### Table 12

Data from F 13

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Systematic uncertainties after the averaging procedure of the differential cross sections as function of the lepton pseudo-rapidity in different channels....

• #### Table 13

Data from F 13

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Systematic uncertainties after the averaging procedure of the differential cross sections as function of the lepton pseudo-rapidity in different channels....

• #### Table 14

Data from F 13

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Systematic uncertainties after the averaging procedure of the differential cross sections as function of the lepton pseudo-rapidity in different channels....

• #### Table 15

Data from F 13

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Systematic uncertainties after the averaging procedure of the differential cross sections as function of the lepton pseudo-rapidity in different channels....

• #### Table 16

Data from F 10

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Theoretical Predictions for the integrated cross section of the production of W+ and W- bosons associated with a single c-jet,...

• #### Table 17

Data from F 10

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PDF uncertainty for each of the used PDF sets as well as the combined parton shower, fragmentation and scale uncertainties...