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Measurement of the cross-section for W boson production in association with b-jets in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector

The ATLAS collaboration
JHEP 1306 (2013) 084, 2013

Abstract (data abstract)
CERN-LHC. This paper reports a measurement of the $W+b$-jets production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 fb$^{-1}$, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading $b$-jet for both the muon and electron decay modes of the $W$ boson. The $W+b$-jets cross-section, corrected for all known detector effects, is quoted in a limited kinematic range, using jets reconstructed with the anti-$k_t$ clustering algorithm with transverse momentum above 25 GeV and rapidity within +- 2.1. Combining the muon and electron channels, the fiducial cross-section for $W+b$-jets is measured to be 7.1 +- 0.5 (stat) +- 1.4 (syst) pb, consistent with next-to-leading order QCD calculations within 1.5 standard deviations.

  • Table 1

    Data from T 4, P 23(preprint)

    10.17182/hepdata.66629.v2/t1

    Measured fiducial $W+b$-jets cross-sections for the combination of the electron and muon channels with statistical and systematic uncertainties and breakdown...

  • Table 2

    Data from T 4

    10.17182/hepdata.66629.v2/t2

    Breakdown of relative systematic uncertainties per jet multiplicity, and combined across jet bins.

  • Table 3

    Data from T 5, T 9

    10.17182/hepdata.66629.v2/t3

    Measured fiducial $W+b$-jets cross-section in the 1-jet region with statistical and systematic uncertainties in bins of $p_T^{b-jet}$. Also shown are...

  • Table 4

    Data from T 5

    10.17182/hepdata.66629.v2/t4

    Fiducial $W+b$-jets cross-section correlations of statistical errors in the 1-jet region in bins of $p_T^{b-jet}$.

  • Table 5

    Data from T 5

    10.17182/hepdata.66629.v2/t5

    Fiducial $W+b$-jets cross-section correlations of systematic errors in the 1-jet region in bins of $p_T^{b-jet}$.

  • Table 6

    Data from T 9

    10.17182/hepdata.66629.v2/t6

    Fiducial $W+b$-jets cross-section correlations of statistical errors in the 1-jet region in bins of $p_T^{b-jet}$ without single-top subtraction.

  • Table 7

    Data from T 9

    10.17182/hepdata.66629.v2/t7

    Fiducial $W+b$-jets cross-section correlations of systematic errors in the 1-jet region in bins of $p_T^{b-jet}$ without single-top subtraction.

  • Table 8

    Data from T 6, T 10

    10.17182/hepdata.66629.v2/t8

    Measured fiducial $W+b$-jets cross-section in the 2-jet region with statistical and systematic uncertainties in bins of $p_T^{b-jet}$. Also shown are...

  • Table 9

    Data from T 6

    10.17182/hepdata.66629.v2/t9

    Fiducial $W+b$-jets cross-section correlations of statistical errors in the 2-jet region in bins of $p_T^{b-jet}$.

  • Table 10

    Data from T 6

    10.17182/hepdata.66629.v2/t10

    Fiducial $W+b$-jets cross-section correlations of systematic errors in the 2-jet region in bins of $p_T^{b-jet}$.

  • Table 11

    Data from T 10

    10.17182/hepdata.66629.v2/t11

    Fiducial $W+b$-jets cross-section correlations of statistical errors in the 2-jet region in bins of $p_T^{b-jet}$ without single-top subtraction.

  • Table 12

    Data from T 10

    10.17182/hepdata.66629.v2/t12

    Fiducial $W+b$-jets cross-section correlations of systematic errors in the 2-jet region in bins of $p_T^{b-jet}$ without single-top subtraction.

  • Table 13

    Data from T 7

    10.17182/hepdata.66629.v2/t13

    Multiplicative correction factors for non-perturbative effects and additive corrections for double-parton interactions, derived from the ALPGEN simulation, applied to the...

  • Table 14

    Data from T 7

    10.17182/hepdata.66629.v2/t14

    Multiplicative correction factors for non-perturbative effects and additive corrections for double-parton interactions, derived from the ALPGEN simulation, applied to the...

  • Table 15

    Data from T 8

    10.17182/hepdata.66629.v2/t15

    Theoretical NLO predictions for the $W+b$-jet fiducial cross-section for one lepton flavour calculated with the MCFM program, corrected for non-perturbative...

Version 2 modifications: Units corrected from nb/GeV to fb/GeV in Tables 3 and 8, due to an apparent mistake in Tables 5, 6, 9 and 10 of arXiv:1302.2929v1.

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