Search for the Standard Model Higgs Boson in the H to τ+τ− to lepton-hadron and hadron-hadron Decay Modes with the ATLAS Detector

Abstract

In this proceeding, a search for a Higgs boson in the H to ${\tau }^{+}{\tau }^{-}$ decay mode, where both taus decay hadronically or one decay hadronically and one leptonically. The analysis is based on a data sample of proton-proton collision collected by the ATLAS detector at the Large Hadron Collider (LHC) at centre-of-mass energies of 7 TeV during 2011, corresponding to an integrated luminosity of $4.7f{b}^{-1}$. No significant excess is observed in the Higgs boson mass range of 100–150 GeV. The observed (expected) limits on the cross-section times branching ratio for H to ${\tau }^{+}{\tau }^{-}$ at $m_H=125\text{GeV}$ are 6.2(5.9) and 6.3(6.5) for lepton-hadron and hadron-hadron decay modes, respectively.