, 2011:90,
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Date: 18 Mar 2011

Inclusive b-hadron production cross section with muons in pp collisions at \( \sqrt {s} = 7\;{\text{TeV}} \)

Abstract

A measurement of the b-hadron production cross section in proton-proton collisions at \( \sqrt {s} = 7\;{\text{TeV}} \) 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 \( p_T^\mu > 6\;{\text{GeV}} \) with respect to the beam direction and pseudorapidity |η μ | < 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 σ(pp → b + Xμ + X′) = 1.32 ± 0.01(stat) ± 0.30(syst) ± 0.15(lumi)μb.