Measurement of the cross-section for b-jets produced in association with a Z boson at root s=7 TeV with the ATLAS detector ATLAS Collaboration
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 706, no 4-5, 295-313 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2012. Vol. 706, no 4-5, 295-313 p.
Standard Model, Z boson, b-Jet, Cross-section
IdentifiersURN: urn:nbn:se:uu:diva-171784DOI: 10.1016/j.physletb.2011.11.059ISI: 000299756800008OAI: oai:DiVA.org:uu-171784DiVA: diva2:512402
With 3024 more authors from the ATLAS Collaboration.2012-03-272012-03-272012-03-27Bibliographically approved