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Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 73: Higgs-Boson 6 (Zerfälle in Tau-Leptonen)

T 73.2: Vortrag

Mittwoch, 29. März 2017, 17:00–17:15, JUR 3

Higgs to Tau Pair coupling measurement in the lepton-hadron final stateUlla Blumenschein1,2, •Antonio De Maria1, Arnulf Quadt1, and Zinonas Zinonos1,31II. Physikalisches Institut, Georg-August-Universität Göttingen — 2now at Queen Mary University of London — 3now at Max Planck Institut für Physik

The decay of the Higgs boson into tau pair is currently the only accessible channel to establish the Higgs-Yukawa coupling to fermions. In this context, the final state in which one tau decays hadronically and the other one decays leptonically (lepton-hadron channel) plays an important role due to the high branching ratio and the moderate background. This talk outlines the main aspects of the ongoing analysis on the coupling measurement in this final state using data from proton-proton collisions recorded by the ATLAS detector at a center-of-mass energy of 13 TeV. In particular, the fitting strategy to extract the signal strength from the combination of the different signal/control regions is presented. The final part of the talk will be dedicated to the description and the demonstration of a new statistical tool, called FitBox, which is based on standard high-energy statistics software and provides important cross checks of the fit model.

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