Boosted Analysis of Higgs Pair Production in the bbτ + τ − Lephad Final State
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Date
2024-01-09
Authors
Luongo, Nicholas
Journal Title
Journal ISSN
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Publisher
University of Oregon
Abstract
This dissertation presents the development of a boosted analysis in the searchfor the resonant production of a new heavy scalar X decaying to two Higgs bosons,
which is predicted by some Beyond the Standard Model theories. The bbτ + τ −
semi-hadronic decay channel of the Higgs bosons is considered. The analysis is
developed using Monte Carlo simulated data and validated with 0.11 fb−1 of
proton-proton collisions at √s = 13 TeV from the ATLAS detector at the Large
Hadron Collider (LHC). Scalar X masses of 1, 1.6, and 2 TeV are considered and
expected limits of 5.29 × 103 , 23.42, and 18.60 fb, respectively, are placed on the
pp → X → HH cross section at 95% confidence level. These results are compared
to existing resolved and boosted ATLAS bbτ + τ − analyses. A new method for di-τ
identification and a kinematic neural network for event selection are also described.
This dissertation contains previously published and unpublished material.