Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 78: Higgs: Extended models

T 78.3: Vortrag

Donnerstag, 2. April 2020, 17:00–17:15, H-HS XVI

New Analysis Techniques for the search for BSM H →ττ with the full Run-2 dataset — •Lino Gerlach and Stan Lai for the ATLAS collaboration — Georg-August-Universität Göttingen

In 2012, a scalar boson was found at CERN that is consistent with the properties of the Higgs boson predicted by the Standard Model of particle physics. Some theories, in particular supersymmetric models, also predict the existence of additional heavier neutral Higgs bosons. The decays of these heavy Higgs bosons to a pair of τ leptons can be siginificant because of the relatively large mass of the τ lepton and additional effects of two-Higgs-doublet models that can enhance the coupling to down-type fermions.

While efforts are ongoing to quickly publish results of a search with the full Run-2 dataset, detailed investigations on the analysis methods and techniques are being carried out to ensure maximal sensitivity in a legacy result with 139 fb−1.

This talk places special emphasis on these investigations. They include a new method of estimating the background of QCD jets faking hadronic tau decays, a machine learning based approach to identify possible signal signatures, and a Z’ scenario signal interpretation.

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