Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 28: Higgs-Boson 3 (assoziierte Produktion)

T 28.1: Vortrag

Dienstag, 28. März 2017, 11:00–11:15, JUR 3

Search in the Associated Higgs Boson Top-Quark Production Channel ttH2ℓ + 1 τhad at s= 13 TeV with ATLAS — •Andre Sopczak1, Babar Ali1, Marine Kuna2, and Simonetta Gentile21IEAP CTU in Prague — 2Universita di Roma, La Sapienza, INFN

After the discovery of a Higgs boson, the measurements of its properties are at the forefront of research. The determination of the associated production of a Higgs boson and a pair of top quarks is of particular importance as the ttH Yukawa coupling is large, and thus a probe for physics beyond the Standard Model.

The ttH production was analysed in the final state with two same-sign light leptions (electrons or muons) and a hadronically decaying tau lepton: ttH → 2ℓ + 1 τhad. The analysis was based on data taken by the ATLAS experiment recorded from 13 TeV proton-proton collisions. It contributed to the combined ATLAS results of four multi-lepton final state analyses. These results were further combined with other ATLAS ttH analyses where H→ γγ and Hbb. The combined results are consistent with the Standard Model (SM) expectation allowing models beyond the SM to be constrained.

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