Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 30: Suche nach Neuen Teilchen II

T 30.5: Talk

Tuesday, March 26, 2019, 17:00–17:15, H07

Recent results on the search for heavy neutral resonances decaying into di-tau final states at the ATLAS detector — •Max Maerker, Dirk Duschinger, Wolfgang Mader, and Arno Straessner — IKTP, TU-Dresden

Searches for new heavy resonances decaying to tau-lepton pairs are both theoretically and experimentally well motivated. Extensions of the Standard Model often include additional particles, such as the Minimal Supersymmetric Standard Model (MSSM) introducing new heavy neutral Higgs bosons A and H. Since the couplings of the heavy neutral Higgs bosons to up-type fermions are strongly enhanced at large values of tan(β), their decay into tau lepton pairs is particularly interesting to search for these particles.

In this talk a analysis of the full Run 2 dataset taken with the ATLAS detector in the search for heavy, neutral Higgs bosons in the fully hadronic di-tau final state is presented. Further improvements are investigated by optimizing the event selection and by splitting the signal region into multiple subregions based on the identification quality and the charge multiplicity of the decay products of the subleading tau candidate. Preliminary results of these studies will be shown.