Top Quark Mass Measurement Via Leptonic Observables in the CMS Experiment using 13 TeV PP Collision Data at the LHC

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Naderpour, Farbod | 2023

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 56587 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Torabian, Mahdi; Zeinali, Maryam
Abstract:
The top quark is the heaviest of elementary particles. It gives the dominant contribution to the radiative correction to the Higgs self coupling constant which itself determines the structure of the electroweak vacuum. Therefore, it is extremely important to have a precise measurement of the top quark mass. On the other hand, whereas the lifetime of top quark is short and rapidly decays to lighter particles, it is not easy to compute and measure its mass with a desired precision. In this work, we propose a measurement method to determine the top quark mass in the t▁t→leptons +jets channel by analyzing the decay of the b-hadron in the top quark decay chain. Through the reconstruction of the invariant mass distribution between the leptons (primarily electrons and muons) originating from the W-boson decay and the muon produced by the b-hadron, we employ a binned likelihood fit to accurately extract the mass of the top quark
Keywords:
Top Quark ; Compact Muon Solenoid (CMS)Test ; Top Mass Measurement