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Measurement of ttH(H→bb) production in the semi-leptonic tt decay channel at the CMS Experiment

El Morabit, Karim

Abstract (englisch):

A measurement of the production of a Higgs boson in association with a top quark-antiquark pair and the subsequent decay of the Higgs boson to a bottom quark-antiquark pair ($\text{t}\bar{\text{t}}\text{H}(\text{H}\rightarrow \text{b}\bar{\text{b}})$) at a center-of-mass energy of $13\,\text{TeV}$ is presented. The measurement focuses on the semileptonic decay channel of the top quark-antiquark pair and is based on proton-proton collision data recorded by the CMS Experiment in the years 2016 and 2017 corresponding to an integrated luminosity of $77.4\,\text{fb}^{-1}$.

The cross section for the production of a Higgs boson in association with a top quark-antiquark pair ($\text{t}\bar{\text{t}}\text{H}$) depends on the top-Higgs Yukawa coupling and a measurement of $\text{t}\bar{\text{t}}\text{H}$ production provides direct access to this important property of the standard model of particle physics. To achieve the measurement of this process, candidate $\text{t}\bar{\text{t}}\text{H}(\text{H}\rightarrow \text{b}\bar{\text{b}})$ events are first selected from the analyzed data. Artificial neural networks are then used to construct observables that allow the discrimination between signal and background processes. ... mehr

Volltext §
DOI: 10.5445/IR/1000135447
Veröffentlicht am 21.07.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Hochschulschrift
Publikationsdatum 21.07.2021
Sprache Englisch
Identifikator KITopen-ID: 1000135447
Verlag Karlsruher Institut für Technologie (KIT)
Umfang iv, 257 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Institut für Experimentelle Teilchenphysik (ETP)
Prüfungsdatum 30.10.2020
Schlagwörter Teilchenphysik, CERN, CMS, LHC, Higgs, Top-Quark, ttH
Referent/Betreuer Husemann, U.
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