6533b86dfe1ef96bd12c9d2d
RESEARCH PRODUCT
Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at √s = 7 TeV with the ATLAS detector
Atlas CollaborationVasiliki MitsouLuca FioriniEduardo Ros MartínezJuan A. Fuster VerdúCarmen García GarcíaSusana Cabrera UrbánSalvador Martí GarcíaJosé Salt CairolsCarlos Lacasta LlácerJuan Antonio Valls FerrerMaría Victoria Castillo GiménezEmilio Higón RodríguezAntonio Ferrer SoriaSantiago González De La HozMohammed KaciYesenia Hernández JiménezMiguel Villaplana Pérezsubject
Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::ExperimentFísica nuclearPartícules (Física nuclear)description
A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b-jet, in pp collisions at root s = 7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb(-1) of data collected with the ATLAS detector at the LHC. The W + b-jet cross section is defined for jets reconstructed with the anti-k(t) clustering algorithm with transverse momentum above 25 GeV and rapidity within +/-2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2 +/- 1.9(stat) +/- 2.6(syst) pb for one lepton flavour. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 |