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Measurement of the Z -> tau tau cross section with the ATLAS detector
DESY, D-2000 Hamburg, Germany .
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
Vise andre og tillknytning
2011 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 84, nr 11, s. 112006-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2011. Vol. 84, nr 11, s. 112006-
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URN: urn:nbn:se:kth:diva-71576DOI: 10.1103/PhysRevD.84.112006ISI: 000298131100002Scopus ID: 2-s2.0-84855259626OAI: oai:DiVA.org:kth-71576DiVA, id: diva2:487993
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QC 20120201Tilgjengelig fra: 2012-02-01 Laget: 2012-01-31 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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