Inclusive b-jet production in pp collisions at sqrt(s)=7 TeV

TL;DR

This paper measures the production rate of b-jets in proton-proton collisions at 7 TeV using CMS data, comparing results with theoretical predictions and employing two different identification methods.

Contribution

It provides the first detailed measurement of inclusive b-jet cross sections at 7 TeV with two independent analysis techniques.

Findings

Results agree with next-to-leading order calculations.

Measurements are consistent with PYTHIA predictions.

The ratio of b-jet to inclusive jet cross sections is provided.

Abstract

The inclusive b-jet production cross section in pp collisions at a center-of-mass energy of 7 TeV is measured using data collected by the CMS experiment at the LHC. The cross section is presented as a function of the jet transverse momentum in the range 18 < pT < 200 GeV for several rapidity intervals. The results are also given as the ratio of the b-jet production cross section to the inclusive jet production cross section. The measurement is performed with two different analyses, which differ in their trigger selection and b-jet identification: a jet analysis that selects events with a b jet using a sample corresponding to an integrated luminosity of 34 inverse picobarns, and a muon analysis requiring a b jet with a muon based on an integrated luminosity of 3 inverse picobarns. In both approaches the b jets are identified by requiring a secondary vertex. The results from the two methods are in agreement with each other and with next-to-leading order calculations, as well as with predictions based on the PYTHIA event generator.