Speaker
Babar Ali
(Czech Technical University (CZ))
Description
The measurement of the associated production of a Higgs boson with a pair
of top quarks is a direct determination of the top-Yukawa coupling at
tree-level, which can be compared with the indirect determination in the
loop-production in gluon-gluon fusion. The decay channel of the system
with several leptons (multi-lepton channel), and jets, gives high
sensitivity. The focus of the analysis is the sub-channel with
two same-sign light leptons (electrons or muons) and a hadronically
decaying tau lepton: $\rm ttH \rightarrow 2\ell + 1 \tau_{had}$. In
particular the background estimate from top-antitop reactions is
discussed. The analysis uses the data set recorded by ATLAS from LHC
Run-II 13~TeV proton-proton collisions.
Author
ATLAS Collaboration
(CERN)
