Inclusive b-hadron production cross section with muons in pp collisions at √s = 7\;TeV

A measurement of the b-hadron production cross section in proton-proton collisions at s = 7 TeV is presented. The dataset, corresponding to 85 nb -1 , was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. Events are selected by the presence of a muon with transverse momentum p T > 6 GeV with respect to the beam direction and pseudorapidity | | < 2.1. The transverse momentum of the muon with respect to the closest jet discriminates events containing b hadrons from background. The inclusive b-hadron production cross section is presented as a function of muon transverse momentum and pseudorapidity. The measured total cross section in the kinematic acceptance is (pp b + X + X ) = 1.32 0.01(stat) 0.30(syst) 0.15(lumi)b.