A simple scheme for masses and mixings of quarks and neutrinos

Details A simple scheme for masses and mixings of quarks and neutrinos A simple scheme for masses and mixings of quarks and neutrinos

1999-05-21

arxiv.org/abs/hep-ph/9905440v2

Phys.Lett. B465 (1999) 219-225

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, references added and minor corrections

Scientific paper

10.1016/S0370-2693(99)01073-4

The mass matrices of charged fermions have a simple structure if expressed in powers of the small parameter sigma=(m_c/m_t)^{1/2}. It is suggested that the mass matrix of the three heavy neutrinos occuring in grand unified theories can be expressed in terms of the same parameter. The requirement that these heavy neutrinos carry different U(1) generation quantum numbers gives rise to an almost unique form for this matrix. By applying the see-saw mechanism, the mass splitting of the two lightest neutrinos comes out to be tiny, favoring the vacuum oscillation solution for solar neutrinos. The mixing matrix is of the bimaximal type but contains also CP violating phases.

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