SMILE

Stochastic Models for the Inference of Life Evolution

Consequences of a unified, anarchical model of fermion masses and mixings

Calibbi, L., Ferretti, L., Romanino, A., Ziegler, R.

Journal of High Energy Physics

2009

We show that most features of the mass and mixing pattern of the second and third SM fermion families can be accounted for without making use of flavour symmetries or other types of flavour dynamics. We discuss the implications for flavour phenomenology, in particular for the \$\backslashtau\backslashto\backslashmu\backslashgamma\$ decay rate, and comment on LFV effects at colliders. We show that the model can be embedded in a full SO(10) supersymmetric GUT in 5 dimensions that preserves the successful MSSM gauge coupling unification prediction for \$\backslashalpha\_s\$. Interesting features of this embedding are i) the connection of one of the hierarchy parameters with the strong coupling assumption, ii) the absence of KK threshold effects on the \$\backslashalpha\_s\$ prediction at one loop, and iii) the shift of the GUT scale up to about \$10^\17\\backslashGeV\$. Proton decay is under control, also due to the larger GUT scale. A large atmospheric angle for normal hierarchical neutrinos is obtained in an unusual way.

Bibtex

@article{calibbi_consequences_2009,
Author = {Calibbi, L and Ferretti, Luca and Romanino, A and
Ziegler, R},
Title = {Consequences of a unified, anarchical model of fermion
masses and mixings},
Journal = {Journal of High Energy Physics},
Volume = {3},
Pages = {031},
abstract = {We show that most features of the mass and mixing
pattern of the second and third SM fermion families can
be accounted for without making use of flavour
symmetries or other types of flavour dynamics. We
discuss the implications for flavour phenomenology, in
particular for the
\$\backslash{}tau\backslash{}to\backslash{}mu\backslash{}gamma\$
decay rate, and comment on LFV effects at colliders. We
show that the model can be embedded in a full SO(10)
supersymmetric GUT in 5 dimensions that preserves the
successful MSSM gauge coupling unification prediction
for \$\backslash{}alpha\_s\$. Interesting features of
this embedding are i) the connection of one of the
hierarchy parameters with the strong coupling
assumption, ii) the absence of KK threshold effects on
the \$\backslash{}alpha\_s\$ prediction at one loop,
and iii) the shift of the GUT scale up to about
\$10^\{17\}\backslash{}GeV\$. Proton decay is under
control, also due to the larger GUT scale. A large
atmospheric angle for normal hierarchical neutrinos is
obtained in an unusual way. },
doi = {10.1088/1126-6708/2009/03/031},
year = 2009
}

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