Computer tools for particle phenomenology

Abstract

The thesis explores the utilization of "Computer Tools for Particle Phenomenology" research, focusing on the calculation of one-loop corrections and decay processes within the Standard Model (SM) of particle physics and Beyond the SM as well. Making use of various use of computational packages such as FeynArts, FeynCalc, LoopTools and FeynCalc, I have conducted a comprehensive investigation into various phenomena. Initially, I evaluated the one-loop correction to electron anomalous magnetic moment (g-2) both analytically and using FeynCalc package in terms of Passarino- Veltman functions. I have reproduced the Hgg and HZg decays in SM and BSM, including some additional new charged scalar particles by incorporating them into a new model file with the aid of FeynRules. Finally I have evaluated the Higgs boson decay to ZZ , for an off-shell Z boson within the SM framework in terms of Passarino-Veltman functions.