Wednesday, July 4, 2012

1207.0467 (Yoni BenTov et al.)

The Flavor of Privacy at the LHC    [PDF]

Yoni BenTov, A. Zee
Motivated by the recent hints from ATLAS and CMS we study the phenomenology of a general class of "Private Higgs" (PH) models, in which fermions obtain their masses from their own Higgs doublets with O(1) Yukawa couplings, and the mass hierarchy is translated into a dynamical chain of vacuum expectation values. This is accomplished by introducing a number of light gauge-singlet scalars, the "darkons," some of which could play the role of dark matter. These models allow for substantial modifications to the decays of the lightest Higgs boson, for instance through mixing with TeV-scale PH fields and light darkons: in general we predict the ratios of partial widths to satisfy Gamma(h -> VV*)_PH/Gamma(h -> VV*)_SM \approx Gamma(h -> photon photon)_PH/Gamma(h -> photon photon)_SM \leq 1 and Gamma(h to bb)_PH/Gamma(h -> bb)_SM ~ O(1), where the inequalities are saturated only in the absence of Higgs mixing with light darkons. If the hVV and h-photon-photon vertices are measured to be smaller than expected from the Standard Model (SM) while the hbb vertex is measured to be within an order of magnitude from the SM value, then the PH model may be a viable candidate for extending the SM.
View original: http://arxiv.org/abs/1207.0467

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