Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Search for Higgs boson production in association with a pair of top-quarks with the Atlas detector

Jul 6, 2018, 6:30 PM
2h
COEX, SEOUL

COEX, SEOUL

Poster Higgs Physics POSTER

Speaker

Tim Michael Heinz Wolf (Nikhef National institute for subatomic physics (NL))

Description

A great success of the Standard Model (SM) was the discovery of a
Higgs boson in 2012. Measuring its properties and yet unobserved production
and decay modes provides a test of the validity of the SM. The process of Higgs
production in association with a pair of top-quarks ($t\bar{t}H$) is still
unobserved. Further interest arises from the fact that it provides direct
access to the top Yukawa coupling which is possibly sensitive to new physics
and therefore provides a crucial test of the SM.
In order to maximize the statistics of the data sample of the $t\bar{t}H$
process the final state of the Higgs decay with the highest branching ratio
into a pair of $b$-quarks has been chosen for this search. This summary is
based on the recently published results using $36.1 fb^{-1}$ in pp collisions
collected with the Atlas detector in 2015 and 2016. Especially the
reconstruction techniques to correctly match the jets originating from
$b$-quarks to their origin, are reviewed. The measurement in the
$t\bar{t}H(b\bar{b})$ final state is put in context with the combination of
the other Higgs decay modes, resulting in evidence for this process.

Primary authors

ATLAS Collaboration Tim Michael Heinz Wolf (Nikhef National institute for subatomic physics (NL))

Presentation materials

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