Measurement of the Z→ττ cross section with the ATLAS detector
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Measurement of the Z→ττ cross section with the ATLAS detector

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Measurement of the Z→ττ cross section with the ATLAS detector

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ATLAS Collaboration; Mitsou, Vasiliki; Ferrer Soria, Antonio Perfil; Cabrera Urbán, Susana Perfil; Castillo Giménez, María Victoria Perfil; Valls Ferrer, Juan Antonio; Fiorini, Luca; Fuster Verdú, Juan A. Perfil; Ros Martínez, Eduardo; Hernández Jiménez, Yesenia; García García, Carmen Perfil; González de la Hoz, Santiago; Higón Rodríguez, Emilio Perfil; Lacasta Llácer, Carlos; Irles Quiles, Adrián; Kaci, Mohammed; Salt Cairols, José Perfil; Martí García, Salvador; Villaplana Pérez, Miguel; Lacuesta Miquel, Vicente
Aquest document és un/a article, creat/da en: 2011

Este documento está disponible también en : http://dx.doi.org/10.1103/PhysRevD.84.112006
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.

    ATLAS Collaboration Mitsou, Vasiliki Ferrer Soria, Antonio Cabrera Urbán, Susana Castillo Giménez, María Victoria Valls Ferrer, Juan Antonio Fiorini, Luca Fuster Verdú, A. Ros Martínez, Eduardo Hernández Jiménez, Yesenia García García, Carmen González de la Hoz, Santiago Higón Rodríguez, Emilio Lacasta Llácer, Carlos Irles Quiles, Adrián Kaci, Mohammed Salt Cairols, José Martí García, Salvador Villaplana Pérez, Miguel Lacuesta Miquel, Vicente 2011 Measurement of the Z→ττ cross section with the ATLAS detector Physical Review D 84 11-112006 1 29
http://dx.doi.org/10.1103/PhysRevD.84.112006
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