Nida MuzammilCIIT/SP18-RPH-016/LHRDr. Shabana NisarLHR TP 63562026-02-042020https://repository.cuilahore.edu.pk/handle/123456789/1116This thesis consists of the study of the Higgs Bosons and its decay rates through various channels in the theoretical frame-work of the Standard Model in particle physics. Higgs Boson is the cornerstone of the whole theoretical edifice that explains all the phenomena in particle physics. Therefore, understanding its appearance in the particle physics experiments i.e., it‘s decay rates, is of utmost importance. Higgs Boson appears as an excitation of the Higgs field which is the reason for the electroweak symmetry breaking in the standard model. We study the electroweak gauge symmetry structure of the standard model which relies on a SU (3) x SU (2) x U (1) gauge group and then study its symmetry breaking structure. This gives rise to massive W and Z bosons and a massive Higgs field which primarily decays into them. We use the Feynman diagrams of the resultant quantum field theory to calculate these decay rates.enDepartment of PhysicsSP18PhysicsDecay RatesStandard ModelParticle PhysicsVarious ChannelsDr. Shabana NisarThesis