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 i...
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