scholarly journals Revisiting lepton flavor violation in a supersymmetric type II seesaw mechanism

2013 ◽  
Vol 87 (9) ◽  
Author(s):  
Debtosh Chowdhury ◽  
Ketan M. Patel
2008 ◽  
Vol 78 (1) ◽  
Author(s):  
M. Hirsch ◽  
J. W. F. Valle ◽  
W. Porod ◽  
J. C. Romao ◽  
A. Villanova del Moral

2015 ◽  
Vol 30 (22) ◽  
pp. 1550130 ◽  
Author(s):  
Rupam Kalita ◽  
Debasish Borah

We study the effects of Majorana neutrino phases in lepton flavor violation and the origin of matter–antimatter asymmetry through the mechanism of leptogenesis within the framework of a model where both type I and type II seesaw mechanisms can contribute to tiny neutrino masses. We parametrize the type I seesaw mass matrix by assuming it to give rise to a tri-bimaximal (TBM) type neutrino mixing which predicts [Formula: see text]. The type II seesaw mass matrix is then constructed in such a way that the necessary deviation from TBM mixing and the best fit values of neutrino parameters can be obtained when both type I and type II seesaw contributions are taken into account. Considering both subleading as well as equally dominating type II seesaw term, we first constrain the Majorana CP phases from the requirement of producing correct baryon asymmetry through leptogenesis and then incorporating the experimental bounds on lepton flavor violating decays [Formula: see text] and [Formula: see text].


2005 ◽  
Vol 20 (06) ◽  
pp. 1180-1187 ◽  
Author(s):  
B. DUTTA ◽  
Y. MIMURA ◽  
R. N. MOHAPATRA

A minimal supersymmetric SO (10) model with one 10 and one 126 Higgs superfield predict all neutrino mixings as well as the solar mass difference squared in agreement with observations. However, the CKM CP phase is constrained to be in the second or third quadrant requiring a significant non-CKM component to CP violation to explain observations. We revisit this issue using type I and II seesaw formula for neutrino masses show that the addition of a nonrenormalizable term restores compatibility with neutrino data and CKM CP violation in both cases. We further find that the MSSM parameter tan β≥30 in the type I model and lepton flavor violation and lepton electric dipole moments are accessible to proposed experiments in both type I and type II models. We also discuss the unification of the gauge couplings in type I model which requires an intermediate scale.


Sign in / Sign up

Export Citation Format

Share Document