Publication Date

2020

Document Type

Dissertation/Thesis

First Advisor

Chakraborty, Dhiman

Degree Name

Ph.D. (Doctor of Philosophy)

Legacy Department

Department of Physics

Abstract

Abstract: This is a search for a Beyond Standard Model (BSM) heavy scalar in the ATLAS detector at 13 TeV center of mass energy using Run 2 data set recorded in 2018 with an integrated luminosity 58.5 fb^{-1}. The heavy scalar (X) decays to two Standard Model (SM) like light Higgs (H) bosons that decay into the bbtautau final state. Particularly, the semi-leptonic final state of two tau's is considered in this search where one tau decays in leptonic final state and other to a hadronic final state. No evidence of a new scalar found, so upper limits are set on the cross-section times branching ratio of the X -> HH -> bbtautau process with 95% condence interval on heavy scalar (X) masses between 251 and 1000 GeV.

Extent

152 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

Included in

Physics Commons

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