Naturally large Yukawa hierarchies
Autor (es)
Nardi, EnricoEntidad
UAM. Departamento de Física TeóricaFecha de edición
2011-08-11Cita
10.1103/PhysRevD.84.036008
Physical Review D 84.3 (2011): 036008
ISSN
1550-7998 (print); 1550-2368 (online)DOI
10.1103/PhysRevD.84.036008Versión del editor
http://dx.doi.org/10.1103/PhysRevD.84.036008Materias
FísicaDerechos
© 2011 American Physical SocietyResumen
The spontaneous breaking of the SU(3)5 quark/lepton flavor symmetry by means of three multiplets of scalar ‘‘Yukawa fields’’ admits vacua with one O(1) and two vanishing vacuum expectation values for each multiplet. If the number of generations is equal to three, and only in this case, the vanishing vacuum expectation values are lifted to exponentially suppressed entries by the inclusion of symmetry invariant logarithmic terms. A strong hierarchy for the Yukawa couplings and a quark mixing matrix that approaches a diagonal form are obtained in a natural way from O(1) parameters. This scenario provides a concrete realization of the minimal flavor violation hypothesis
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