Tuesday, October 23, 2012

1210.5568 (Gustavo Burdman et al.)

Full-hierarchy Quiver Theories of Electroweak Symmetry Breaking and
Fermion Masses
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Gustavo Burdman, Nayara Fonseca, Leonardo de Lima
We consider quiver theories in four dimensions with a large ultra-violet cutoff. These theories require that an ordered set of vacuum expectation values for the link fields develops dynamically and can be obtained from the coarse deconstruction of extra-dimensional theories in an AdS background. These full-hierarchy quiver theories form a large class which include AdS$_5$ models as a limit, but which have a distinctive phenomenology. As an example, in this paper we show that fermions can be introduced in a way that can at the same time generate the fermion mass hierarchy and have flavor violation consistent with experimental bounds, when the mass scale of the color-octect gauge excitation is above $3 {\rm TeV}$. We also show that electroweak precision constraints are satisfied by this mass scale, without the need to extend the gauge sector to protect against custodial violation.
View original: http://arxiv.org/abs/1210.5568

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