Speaker
Ms
Jana Novakova
(Charles University (CZ))
Description
The Z to tau tau cross section has been recently measured using data collected with the ATLAS detector corresponding to the integrated luminosity of 1.34 − 1.55 fb-1. The analysis is performed in three different final states determined by decay modes of the tau leptons - so-called electron + hadronic tau, muon + hadronic tau and electron + muon channels. Cross sections are measured separately in each final state in a fiducial kinematic phase space, and also extrapolated to the full phase space in the invariant mass region 66 − 116 GeV. The individual cross sections are combined together and the product of the total Z boson production cross section and Z to tau tau branching fraction is measured to be 0.92 +/- 0.20(stat) +/- 0.08(syst) +/-
0.03(lumi) nb, in agreement with the NNLO theoretical expectation.
Author
Ms
Jana Novakova
(Charles University (CZ))
