Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 30: Higgs: BSM

T 30.3: Talk

Monday, March 9, 2015, 17:15–17:30, K.11.23 (HS 32)

Search for the neutral MSSM Higgs bosons in the final state with hadronically decaying τ pairs at the ATLAS experiment — •Federico Scutti, Jochen Dingfelder, and Will Davey for the ATLAS collaboration — Nussallee 12, Bonn, 53115

The Minimal Supersymmetric Standard Model (MSSM) predicts the existence of five Higgs bosons, two charged (H^±) and three neutral (h, H, A). At tree level their properties are determined by two parameters: the mass of the CP−odd Higgs boson m_A, and the vacuum expectation values of the two Higgs doublets tanβ. At large values of tanβ the couplings to b quarks or τ leptons is significantly enhanced. In this talk the search for the neutral MSSM Higgs bosons (h, H, A) is presented in the decay channel into τ pairs, where each τ decays hadronically. This specific channel is particularly sensitive in the hypothesis of high m_A. The dominant background processes are di-jets, Drell-Yan and W+jets production.

To separate the signal from these backgrounds the selection is optimised in two independent categories, with best sensitivities in complementary mass regions, based on different trigger decisions.