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

TL;DR

This paper reports a measurement of the inclusive b-hadron production cross section in proton-proton collisions at 7 TeV using CMS data, employing muon-based event selection and kinematic analysis.

Contribution

It provides the first measurement of b-hadron production cross section at 7 TeV with muon-based selection in CMS, including detailed kinematic dependence.

Findings

Total cross section measured as 1.32 microbarns

Cross section dependence on muon transverse momentum and pseudorapidity

Results agree with theoretical predictions within uncertainties

Abstract

A measurement of the b-hadron production cross section in proton-proton collisions at sqrt(s)=7 TeV is presented. The dataset, corresponding to 85 inverse nanobarns, 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 greater than 6 GeV with respect to the beam direction and pseudorapidity less than 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 sigma(pp to b+X to mu + X') =1.32 +/- 0.01 (stat) +/- 0.30 (syst) +/- 0.15 (lumi) microbarns.