Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 74: Higgs: Erweiterte Modelle II / Suchen

T 74.4: Vortrag

Donnerstag, 22. März 2018, 17:15–17:30, Philo-HS2

Search for Neutral MSSM Higgs Bosons in the H/A→ττ channel at ATLAS — •Emily Thompson, William Davey, and Jochen Dingfelder — Physikalisches Institut Universität Bonn

The Minimal Supersymmetric Standard Model (MSSM) is an extension of the Standard Model (SM) that is able to address problems of the SM such as the hierarchy problem, gauge coupling unification and the existence of dark matter. Its Higgs Sector consists of two charged, H^±, and three neutral Higgs bosons, h, H, A. The couplings of H and A to down-type fermions are enhanced over a large region of parameter space, resulting in increased branching fractions to τ leptons and b-quarks. This has motivated a variety of searches of MSSM Higgs bosons decaying into ττ final states.

In this talk, a search for neutral MSSM Higgs Bosons decaying into a τ lepton pair is presented in the channel where one τ decays leptonically and the other τ decays hadronically. The selection is split into a b-tagged and a b-veto region to optimize the sensitivity for different production processes. Currently, the H→ττ analysis is being developed for use with the full Run 2 dataset of proton-proton collision data collected with the ATLAS detector at a centre-of-mass energy of √s = 13 TeV. The recent progress of this development is presented, with a focus on signal region optimization.