Search for the Standard Model Higgs boson in H-> tau tau decays with the ATLAS detector

par M. Dimitris Varouchas (LAL Orsay)

mercredi 13 mars 2013, 14:00 → 15:00 Europe/Paris

Salle Mondrian

In this seminar, a search for the Standard Model (SM) Higgs boson decaying into a pair of tau leptons will be reported. The analysis is based on data samples of p-p collisions collected by the ATLAS experiment at the LHC and corresponding to integrated luminosities of 4.6 ifb and 13.0 ifb at centre-of-mass energies of sqrt(s)=7 TeV and 8 TeV, respectively. The observed (expected) upper limit at 95% CL on the cross-section times the branching ratio for SM H→ττ is found to be 1.9 (1.2) times the SM prediction for a Higgs boson with mass mH =125~GeV. For this mass, the observed (expected) deviation from the background-only hypothesis corresponds to a local significance of 1.1 (1.7) standard deviations.