Type of Document Dissertation Author Rayyan, Saifuddin Ramadan Author's Email Address firstname.lastname@example.org URN etd-05242007-151447 Title Phenomenological Consequences of Heavy Right Handed Neutrinos Degree PhD Department Physics Advisory Committee
Advisor Name Title Takeuchi, Tatsu Committee Chair Chang, Lay Nam Committee Member Minic, Djordje Committee Member Mizutani, Tetsuro Committee Member Pitt, Mark L. Committee Member Schmittmann, Beate Committee Member Keywords
- Right Handed Neutrinos
- CP violation
- Electric Dipole Moment
Date of Defense 2007-05-10 Availability unrestricted Abstract
The discovery of neutrino mixing provides the possibility of a non vanishing CP violating phase in the neutrino mixing matrix. CP violation in the leptonic sector can be large enough to explain the matter-antimatter asymmetry in the universe. An indirect probe of CP violation is the experimental measurement of Electric Dipole Moment (EDM). CP violation has been discovered in the quark sector,but it contributes to lepton EDM at the 3-loop level.
Neutrino masses can be generated in the standard model via the see-saw mechanism where heavy right-handed neutrinos mix with the weak-basis states. The Majorana nature of the seesaw type neutrinos generates new 2-loop diagrams that lead to a non-vanishing lepton EDM. Only estimates of the resulting EDM have been done in the literature. A full calculation of the 2-loop diagrams and the exact result is presented.
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