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In 1964, a mechanism explaining the origin of particle masses was
proposed by Robert Brout, Francois Englert, and Peter W. Higgs. 48
years later, in 2012, the so-called Higgs boson was discovered in
proton-proton collisions recorded by experiments at the LHC. Since
then, its ability to interact with quarks remained experimentally
unconfirmed. This book presents a search for Higgs bosons produced
in association with top quarks tt H in data recorded with the CMS
detector in 2016. It focuses on Higgs boson decays into bottom
quarks H bb and top quark pair decays involving at least one
lepton. In this analysis, a multiclass classification approach
using deep learning techniques was applied for the first time. In
light of the dominant background contribution from tt production,
the developed method proved to achieve superior sensitivity with
respect to existing techniques. In combination with searches in
different decay channels, the presented work contributed to the
first observations of tt H production and H bb decays.
In 1964, a mechanism explaining the origin of particle masses was
proposed by Robert Brout, Francois Englert, and Peter W. Higgs. 48
years later, in 2012, the so-called Higgs boson was discovered in
proton-proton collisions recorded by experiments at the LHC. Since
then, its ability to interact with quarks remained experimentally
unconfirmed. This book presents a search for Higgs bosons produced
in association with top quarks tt H in data recorded with the CMS
detector in 2016. It focuses on Higgs boson decays into bottom
quarks H bb and top quark pair decays involving at least one
lepton. In this analysis, a multiclass classification approach
using deep learning techniques was applied for the first time. In
light of the dominant background contribution from tt production,
the developed method proved to achieve superior sensitivity with
respect to existing techniques. In combination with searches in
different decay channels, the presented work contributed to the
first observations of tt H production and H bb decays.
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