Measurement of the cross section for open-beauty production with muons and b-tagged jets in pp Collisions at sqrt(s) = 7 TeV

The measurement of the total and differential cross sections $\dsdPt$ and $\dsdy$ for inclusive b-jet production in \pp\ collisions at $\sqrt{s}=7\,\mathrm{TeV}$ is presented. The dataset corresponds to $3.0\,\mathrm{pb}^{-1}$ of integrated luminosity recorded by the CMS collaboration in 2010. A sample of events containing b-tagged jets and at least one muon is selected for the study. The transverse momentum of the muon with respect to the closest b-tagged jet axis discriminates b jets from the background. The measured b-jet production cross section for transverse momentum $\pt > 30\GeV$ and rapidity $\absy <2.4$ is $\sigma(\text{pp}\rightarrow \text{b}+X) = 2.14\pm0.01 (\mathrm{stat}) \pm 0.41 (\mathrm{syst}) \pm 0.09 (\mathrm{lumi}) \ub$. The data are compared with QCD Monte Carlo predictions at LO and NLO accuracy.