Quasi-degenerate neutrinos and leptogenesis from L mu-L tauReportar como inadecuado



 Quasi-degenerate neutrinos and leptogenesis from L mu-L tau


Quasi-degenerate neutrinos and leptogenesis from L mu-L tau - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Descargar gratis o leer online en formato PDF el libro: Quasi-degenerate neutrinos and leptogenesis from L mu-L tau
We provide a framework for quasi-degenerate neutrinos consistent with a successful leptogenesis, based on the L mu-L tau flavor symmetry and its breaking pattern. In this scheme, a fine-tuning is needed to arrange the small solar neutrino mass splitting. Once it is ensured, the atmospheric neutrino mass splitting and the deviation from the maximal atmospheric mixing angle are driven by the same symmetry breaking parameter lambda~0.1, and the reactor angle is predicted to be slightly smaller than lambda, while the Dirac CP phase is generically of order one. Given that the pseudo-Dirac nature of right-handed neutrinos is protected from the flavor symmetry breaking, a small mass splitting can be generated radiatively. For moderate values of tanbeta~10, this allows for low-scale supersymmetric leptogenesis, overcoming a strong wash-out effect of the quasi-degenerate light neutrinos and evading the gravitino overproduction.



Autor: E. J. Chun; K. Turzynski

Fuente: https://archive.org/







Documentos relacionados