Phenomenology of the U(1)'-extended minimal supersymmetric standard model

The Minimal Supersymmetric Standard Model (MSSM) provides a realistic model that incorporates both Supersymmetry and the Standard Model along with a great predictive power. However it suffers from a fine-tuning problem, known as mu-problem. The mu parameter is the only dimensionful term in the Supersymmetry-conserving sector which is required to have the same scale as the Supersymmetry-breaking soft mass terms. The MSSM does not provide the reason why the mu parameter should have the Supersymmetry-breaking scale. This can be most naturally resolved by the introduction of a TeV-scale U(1) gauge symmetry, U(1)'. The U(1)'-extended MSSM has distinctive predictions associated with the Z' gauge boson at the TeV-scale and the extra singlet Higgs that breaks the symmetry spontaneously. The various phenomenology in this model is discussed in this thesis. We study the big bang nucleosynthesis constraints on the Z' properties, the relic density of the modified lightest neutralino, the muon anomalous magnetic moment contribution including extended neutralinos, and various rare B decay modes that may be mediated by a flavor changing Z'.