6533b852fe1ef96bd12ab3cc
RESEARCH PRODUCT
Measurement of the cross-section for b-jets produced in association with a Z boson at √s=7 TeV with the ATLAS detector
Atlas CollaborationVasiliki MitsouAntonio Ferrer SoriaLuca FioriniEduardo Ros MartínezJuan A. Fuster VerdúCarmen García GarcíaSusana Cabrera UrbánSalvador Martí GarcíaJosé Salt CairolsCarlos Lacasta LlácerJuan Antonio Valls FerrerMaría Victoria Castillo GiménezEmilio Higón RodríguezSantiago González De La HozMohammed KaciYesenia Hernández JiménezMiguel Villaplana Pérezsubject
Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::ExperimentFísica nucleardescription
A measurement is presented of the inclusive cross-section for b-jet production in association with a Z boson in pp collisions at a centre-of-mass energy of root s = 7 TeV. The analysis uses the data sample collected by the ATLAS experiment in 2010, corresponding to an integrated luminosity of approximately 36 pb(-1). The event selection requires a Z boson decaying into high P-T electrons or muons, and at least one b-jet, identified by its displaced vertex, with transverse momentum p(T) > 25 GeV and rapidity vertical bar y vertical bar < 2.1. After subtraction of background processes, the yield is extracted from the vertex mass distribution of the candidate b-jets. The ratio of this cross-section to the inclusive Z cross-section (the average number of b-jets per Z event) is also measured. Both results are found to be in good agreement with perturbative QCD predictions at next-to-leading order.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 |