Nonzero U-e3, CP violation, and leptogenesis in a seesaw type softly broken A(4) symmetric model

作者：Adhikary Biswajit^*; Ghosal Ambar

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2008, 78(7): 073007.

DOI：10.1103/PhysRevD.78.073007

We have shown that nonzero U-e3 is generated in a seesaw type softly broken A(4) symmetric model through a single parameter perturbation in m(D) in a single element. We have explored all possible 9 cases to study the neutrino mixing angles considering the best fitted values of Delta m(2) and Delta m(atm)(2) with all parameters real. We have extended our analysis for the complex case and demonstrated large low energy CP violation (J(CP)similar or equal to 10(-2)) and m(ee) in addition to mixing and mass pattern. We have also investigated leptogenesis and for a reasonable choice of model parameters compatible with low energy data, the Wilkinson Microwave Anisotropy Probe (WMAP) value of baryon asymmetry 6x10(-10) is obtained for right-handed neutrino mass scale M-0 similar or equal to 10(13) GeV. We have obtained a relation among the phases responsible for leptogenesis and have shown that those phases also have correlations with low energy CP violating phases.

• 出版日期2008-10