19 citations · 29 across the 3 of their papers we have counts for
5 papers · 1 filter
CP Violation and Flavour Mixings in Orbifold GUTs
Gautam Bhattacharyya, Gustavo C. Branco, Joaquim I. Silva-Marcos
We address the flavour problem by incorporating the hypothesis of universal strength of Yukawa couplings in the framework of a 5D GUT model compactified on an $S^1/(Z_2 \times Z_2^…
Yukawa Textures, New Physics and Nondecoupling
Gustavo C. Branco, M. N. Rebelo, J. I. Silva-Marcos
We point out that New Physics can play an important r\^ ole in rescuing some of the Yukawa texture zero ans\" atze which would otherwise be eliminated by the recent, more precise m…
On the Reduction of CP Violation Phases
J. I. Silva-Marcos
We describe a method that is used to reduce, significantly, the number of CP violating complex phases in the Yukawa parameters. With this Reduction of Complex Phases (RCP) we obtai…
Breaking democracy with non renormalizable mass terms
Joaquim I. Silva-Marcos
The exact democratic structure for the quark mass matrix, resulting from the action of the family symmetry group , is broken by the vaccum expectation values o…
An Alternative to See-Saw
J. I. Silva-Marcos
We give a new mechanism for generating very small, and almost degenerate, neutrino masses, without resorting to the see-saw mechanism or unnatural small Yukawa couplings. It requir…