Search for tt̄H production in the H --> bb̄ decay channel / Marcel Rieger.

Format:

Book

Author/Creator:

Rieger, Marcel, author.

Series:

Springer theses

Language:

English

Subjects (All):

Higgs bosons.

Quarks.

Collisions (Nuclear physics).

Radioactive decay.

Genre:

Electronic books.

Physical Description:

1 online resource.

Place of Publication:

Cham : Springer, [2021]

System Details:

text file

Summary:

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 ttH 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 ttH production and H bb decays.

Contents:

Introduction

The ttH Process in the Standard Model of Particle Physics

Experimental Setup

Analysis Strategy

Analysis Technologies.

Notes:

"Doctoral thesis accepted by RWTH Aachen University, Aachen, Germany."

Includes bibliographical references.

Online resource; title from PDF title page (SpringerLink, viewed March 30, 2021).

ISBN:

9783030653804

3030653803

OCLC:

1240209619

Access Restriction:

Restricted for use by site license.