Publication Date

2022

Document Type

Dissertation/Thesis

First Advisor

Zutshi, Vishnu

Degree Name

Ph.D. (Doctor of Philosophy)

Legacy Department

Department of Physics

Abstract

This dissertation reports on the search for the vector boson scattering (VBS) in semileptonicZV channel, where the Z boson decays to a pair of leptons (electrons or muons), and the other vector boson V (either W or Z) decays hadronically to a pair of jets, in association of two large pseudorapidity jets i.e. ZVjj → l+l−jjjj, l = e or μ. The search used 137 fb−1 of proton-proton collision data collected by the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) with center-of-mass energy (√s) of 13 TeV from 2016 to 2018. VBS is a key process in understanding the nature of electroweak symmetry breaking (EWSB) in the framework of Standard Model (SM). Studies and instrumentation done towards the future detector upgrade to the CMS experiment which will replace the current endcap Hadronic Calorimeter (HCAL) and Electromagnetic Calorimeter (ECAL) with High Granularity Calorimeter (HGCAL) during Long Shutdown 3 (LS3) are also reported. Optimal configuration of scintillator tiles coupled to silicon photomultipliers (SiPMs) in the HGCAL is measured and suggested using testbeam measurement of scintillator tiles and noise measurement of SiPMs. Prototyping of automated wrapping of scintillator tiles in Enhanced Specular Reflector (ESR) film are also discussed.

Extent

144 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

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