Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 3: Higgs: Produktion und Zerfälle

T 3.10: Talk

Monday, March 25, 2019, 18:15–18:30, H04

Measurements of Simplified Template Cross Sections in the H→ττ decay channel — •Fabian Becherer, Kathrin Becker, David Hohn, and Markus Schumacher — Albert-Ludwigs-Universität Freiburg

One goal of the LHC is to investigate the observed Higgs boson as precisely as possible by being as model independent as possible. The Simplified Template Cross Sections (STXS) method provides finely-grained measurements of cross sections in well-defined phase space regions. These regions are defined to minimize the dependence on theoretical uncertainties, to isolate possible beyond the SM effects and to maximize experimental sensitivity. The common definiton of the STXS across the Higgs boson decay channels allows a simple combination of the individual measurements, so that the STXS will benefit from a global combination of them.
This talk presents the first results for the STXS in the H→ττ decay channel published by ATLAS in November 2018 and early studies with the full proton-proton data set recorded from 2015 until 2018. It will point out the most sensitive phase space regions in the published H→ττ analysis and summarize possible optimisation of the analysis strategy, to increase the sensitivity in these regions and to expand the measured phase space. To this end the definition of the signal event selection as well as the number of measured cross sections are studied.