5–12 Jul 2017
Venice, Italy
Europe/Zurich timezone
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Search for the associated production of a Higgs boson and a top quark pair in multilepton (2 leptons, no hadronically-decaying τ lepton candidates and 4 leptons) final states with the ATLAS detector.

Not scheduled
15m
Salone Adriatico (Palazzo del Casinò)

Salone Adriatico

Palazzo del Casinò

Board: HG-22
Poster Presentation Higgs and New Physics Poster session

Speaker

Ana Elena Dumitriu (IFIN-HH Bucharest (RO), CPPM (Aix-Marseille Université, CNRS/IN2P3, FR))

Description

The Yukawa coupling of the Higgs boson to the top quark is a key parameter of the Standard Model. It can be constrained using the associated production process pp → ttH + X.

A search for this process using final states with multiple leptons, primarily targeting the decays H→ WW∗ and H → ττ, has been performed using the data set recorded by the ATLAS detector in 2015 and 2016 at a center of mass energy √s= 13 TeV.
The analysis presented here includes two of the four final states distinguished by the number and flavor of leptons: two same-charge light leptons ( e or µ ) and no hadronically-decaying τ lepton candidates (2l0τhad) and four light leptons (4l), the remaining channels not covered being two same-charge light leptons and one hadronically-decaying τ lepton candidate (2l1τhad) and three light leptons (3l). The different background sources are also presented for each channel considered. The latest best-fit value for the ratio of observed versus

Standard Model cross sections is then given as well as an upper limit on this parameter.

Experimental Collaboration ATLAS

Primary author

Yoram Rozen (Technion (IL))

Presentation materials

There are no materials yet.