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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...
https://www.hepdata.net/record/data/417344yaml https://www.hepdata.net/record/data/417344/csvcsv
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.
https://www.hepdata.net/record/data/417345yaml https://www.hepdata.net/record/data/417345/csvcsv
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...
https://www.hepdata.net/record/data/417346yaml https://www.hepdata.net/record/data/417346/csvcsv
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 $p_T^{b-jet}$.
https://www.hepdata.net/record/data/417347yaml https://www.hepdata.net/record/data/417347/csvcsv
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 $p_T^{b-jet}$.
https://www.hepdata.net/record/data/417348yaml https://www.hepdata.net/record/data/417348/csvcsv
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.
https://www.hepdata.net/record/data/417349yaml https://www.hepdata.net/record/data/417349/csvcsv
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.
https://www.hepdata.net/record/data/417350yaml https://www.hepdata.net/record/data/417350/csvcsv
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...
https://www.hepdata.net/record/data/417351yaml https://www.hepdata.net/record/data/417351/csvcsv
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 $p_T^{b-jet}$.
https://www.hepdata.net/record/data/417352yaml https://www.hepdata.net/record/data/417352/csvcsv
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 $p_T^{b-jet}$.
https://www.hepdata.net/record/data/417353yaml https://www.hepdata.net/record/data/417353/csvcsv
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.
https://www.hepdata.net/record/data/417354yaml https://www.hepdata.net/record/data/417354/csvcsv
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.
https://www.hepdata.net/record/data/417355yaml https://www.hepdata.net/record/data/417355/csvcsv
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...
https://www.hepdata.net/record/data/417356yaml https://www.hepdata.net/record/data/417356/csvcsv
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...
https://www.hepdata.net/record/data/417357yaml https://www.hepdata.net/record/data/417357/csvcsv
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...
https://www.hepdata.net/record/data/417358yaml https://www.hepdata.net/record/data/417358/csvcsv

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