Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 24: Higgs-Boson (Zerfall in Tau-Leptonen) II
T 24.9: Vortrag
Montag, 29. Februar 2016, 18:45–19:00, VMP5 HS A
Optimization studies for the H → τlepτhad decay channel with the ATLAS detector — •Jessica Liebal, Thomas Schwindt, Jana Kraus, Jürgen Kroseberg, and Norbert Wermes — Universität Bonn
At the beginning of 2015 the ATLAS collaboration published an evidence for the Higgs boson decay into a pair of τ leptons consistent with the Standard Model expectation. The observed excess at mH=125 GeV corresponds to 4.5 standard deviations. The analysis was based on a combination of data samples collected in 2011 and 2012 with ATLAS at √s=7 TeV and √s=8 TeV corresponding to an overall integrated luminosity of 24.9 fb−1. A preliminary combination of ATLAS and CMS Run1 results yielded an observation with a measured (observed) significance of 5.5. This talk highlights selected aspects of the Run1 ATLAS H→ ττ analysis focussing on the H → τlepτhad decay process in which one tau decays leptonically and the other one hadronically. Options to improve the analysis as well as channel-specific challenges for Run2 are discussed.