Measurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
Eur.Phys.J.C 84 (2024) 27, 2024.

Abstract (data abstract)
The strange quark content of the proton is probed through the measurement of the production cross section for a W boson and a charm (c) quark in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis uses a data sample corresponding to a total integrated luminosity of 138 fb$^{-1}$ collected with the CMS detector at the LHC. The W bosons are identified through their leptonic decays to an electron or a muon, and a neutrino. Charm jets are taggedusing the presence of a muon or a secondary vertex inside the jet.The W+c production cross section and the cross section ratio $R_c^{\pm} = \sigma({\rm W^+ + \bar{c}}) / \sigma({\rm W^- + c}) $ are measured inclusively and differentially as functions of the transverse momentum and the pseudorapidity of the lepton originating from the W boson decay.The precision of the measurements has been improved with respect to previous studies, reaching 1% in $R_c^{\pm}$. The measurements are compared with theoretical predictions up to next-to-next-to-leading order in perturbative quantum chromodynamics.

  • Table 1

    Data from Table 7

    10.17182/hepdata.141611.v1/t1

    Particle level efficiency*acceptance correction factors and cross section measurements for the four channels (W decay to muon or electron and...

  • Table 2

    Data from Table 8

    10.17182/hepdata.141611.v1/t2

    Parton level efficiency*acceptance correction factors and cross section measurements for the four channels (W decay to muon or electron and...

  • Table 3

    Data from Table 9

    10.17182/hepdata.141611.v1/t3

    Inclusive cross section predictions at QCD NLO accuracy from MCFM using different PDF sets

  • Table 4

    Data from Table 12

    10.17182/hepdata.141611.v1/t4

    Inclusive cross section predictions up to QCD NNLO accuracy using the NNPDF3.1 PDF set

  • Table 5

    Data from Table 10

    10.17182/hepdata.141611.v1/t5

    Measured production cross sections ratio $\sigma(W^+ + \overline{c})$ / $\sigma(W^- + c)$

  • Table 6

    Data from Table 11

    10.17182/hepdata.141611.v1/t6

    Predictions for the cross sections ratio $\sigma(W^+ + \overline{c})$ / $\sigma(W^- + c)$ at QCD NLO accuracy from MCFM using...

  • Table 7

    Data from Table 13

    10.17182/hepdata.141611.v1/t7

    Predictions for the cross sections ratio $\sigma(W^+ + \overline{c})$ / $\sigma(W^- + c)$ up to QCD NNLO accuracy using the...

  • Table 8

    Data from Figure 5

    10.17182/hepdata.141611.v1/t8

    Measured diferential cross sections $\sigma(W^- + c) + \sigma(W^+ + \overline{c})$ as a function of the absolute value of the...

  • Table 9

    Data from Figure 5

    10.17182/hepdata.141611.v1/t9

    Measured diferential cross sections as a function of the transverse momentum of the lepton from the W decay, unfolded to...

  • Table 10

    Data from Figure 7

    10.17182/hepdata.141611.v1/t10

    Measured diferential cross sections $\sigma(W^- + c) + \sigma(W^+ + \overline{c})$ as a function of the absolute value of the...

  • Table 11

    Data from Figure 7

    10.17182/hepdata.141611.v1/t11

    Measured diferential cross sections as a function of the transverse momentum of the lepton from the W decay, unfolded to...

  • Table 12

    Data from Figure 9

    10.17182/hepdata.141611.v1/t12

    Measured diferential cross sections ratio $R=\sigma(W^+ + \overline{c}) / \sigma(W^- + c)$ as a function of the absolute value of...

  • Table 13

    Data from Figure 9

    10.17182/hepdata.141611.v1/t13

    Measured diferential cross sections ratio $R=\sigma(W^+ + \overline{c}) / \sigma(W^- + c)$ as a function of the transverse momentum of...

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