Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 707, no 5, 418-437 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2012. Vol. 707, no 5, 418-437 p.
PARTON DISTRIBUTIONS, LHC
IdentifiersURN: urn:nbn:se:kth:diva-84554DOI: 10.1016/j.physletb.2011.12.046ISI: 000300211000002ScopusID: 2-s2.0-84862797737OAI: oai:DiVA.org:kth-84554DiVA: diva2:499457
FunderSwedish Research Council
QC 201202142012-02-132012-02-132012-04-04Bibliographically approved