Measurement of the $Z\to\tau\tau$ Cross Section with the ATLAS Detector
2011 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 84, no 11, 112006- p.Article in journal (Refereed) Published
The Z -> tau tau cross section is measured with the ATLAS experiment at the LHC in four different final states determined by the decay modes of the tau leptons: muon-hadron, electron-hadron, electron-muon, and muon-muon. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb(-1), at a proton-proton center-of-mass energy of root s = 7 TeV. Cross sections are measured separately for each final state in fiducial regions of high detector acceptance, as well as in the full phase space, over the mass region 66-116 GeV. The individual cross sections are combined and the product of the total Z production cross section and Z -> tau tau branching fraction is measured to be 0.97 +/- 0.07(stat) +/- 0.06(syst) +/- 0: 03(lumi) nb, in agreement with next-to-next-to-leading order calculations.
Place, publisher, year, edition, pages
2011. Vol. 84, no 11, 112006- p.
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-66746DOI: 10.1103/PhysRevD.84.112006ISI: 000298131100002OAI: oai:DiVA.org:su-66746DiVA: diva2:468446
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
Publikationen har totalt 3025 författare, G. Aad et al.2011-12-202011-12-202012-01-26Bibliographically approved