Open beauty production cross section with muons in pp collisions at a center-of-mass energy of 7TeV

A measurement of the open beauty production cross section in proton-proton collisions at $\sqrt{s}=7\,\mathrm{TeV}$ is presented. The dataset, corresponding to about $8.1\,\mathrm{nb}^{-1}$, was recorded with the CMS experiment at the Large Hadron Collider (CERN). Events are selected by the presence of one muon with transverse momentum $p^\mu_\perp > 6\,\mathrm{GeV}$ with respect to the beam direction and pseudorapidity $|\eta^\mu| < 2.1$. The transverse momentum of the muon with respect to the closest track jet discriminates $b$ events from background. The open beauty production cross section is presented as a function of muon transverse momentum and pseudorapidity. The data are compared with QCD Monte Carlo predictions.