Title page for ETD etd-05242007-151447

Type of Document Dissertation
Author Rayyan, Saifuddin Ramadan
Author's Email Address srayyan@vt.edu
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
  • Right Handed Neutrinos
  • CP violation
  • Electric Dipole Moment
Date of Defense 2007-05-10
Availability unrestricted

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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