Phenomenology of the Non-sterile Electroweak-scale Right-handed Neutrino Model

Kamat, Ajinkya, Physics - Graduate School of Arts and Sciences, University of Virginia
Pham, Hung, Department of Physics, University of Virginia

In this dissertation we have discussed the phenomenology of the non-sterile Electroweak-scale Right-handed Neutrino (EWν_R) model. In the EWν_R model, a right-handed neutrino can naturally acquire a mass around the electroweak scale Λ_{EW} ≈ 246 GeV. This model adds the mirror fermions and an interesting Higgs sector to the particle spectrum in the Standard Model. We demonstrate that a significant part of the parameter space in the original EWν_R model agrees with the precision constraints from the "Oblique Parameter" measurements. We then discuss the development of a minimal extension to the original EWν_R model. This extended EWν_R model includes the 125-GeV scalar that possesses "a dual nature": it can either be a SM-like Higgs OR an impostor very different from the SM Higgs, both of which have the signal strengths compatible with experiments.

PHD (Doctor of Philosophy)
All rights reserved (no additional license for public reuse)
Issued Date: