1206.4701 (Luca Vecchi)

A Flavor Sector for the Composite Higgs    [PDF]

Luca Vecchi

Partial Compositeness provides a very natural explanation of the fermion mass hierarchy, and an attractive organizing principle for flavor violation beyond the standard model. Here we discuss its implementation within large N Composite Higgs models. We argue that a separation of scales between flavor and Higgs dynamics can be employed to parametrically suppress dipole and penguin operators. Such a separation effectively removes the most stringent experimental constraints on these scenarios, arising from the lepton sector and the neutron EDM. The dominant source of flavor violation is controlled by 4-fermion operators, whose Wilson coefficients may also be suppressed if a hierarchy of couplings is arranged. Models consistent with all flavor and elecroweak data can be obtained with a new physics scale within the reach of the LHC. The dual 5D picture of these models is realized via wavefunction localization on a warped background featuring additional flavor branes between the UV and IR cutoffs.

View original: http://arxiv.org/abs/1206.4701