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We calculate the production of a W boson in association with up to two jetsincluding at least one b-jet to next-to-leading order (NLO) in QCD at the CERNLarge Hadron Collider with 7 TeV center-of-mass energy. Both exclusive andinclusive event cross section and b-jet cross sections are presented. Thecalculation is performed consistently in the five-flavor-number scheme whereboth q anti-q' and bq (q =\= b) initiated parton level processes are includedat NLO QCD. We study the residual theoretical uncertainties of the NLOpredictions due to the renormalization and factorization scale dependence, tothe uncertainty from the parton distribution functions, and to the values ofalpha_s and the bottom-quark mass.

NLO QCD predictions for W+1 jet and W+2 jet production with at least one b jet at the 7 TeV LHC