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The LHC phenomenology of a low-scale gauged flavor symmetry model withinverted hierarchy is studied, through introduction of a simplified model ofbroken flavor symmetry. A new scalar (a flavon) and a new neutral top-philicmassive gauge boson emerge with mass in the TeV range along with a new heavyfermion associated with the standard model top quark. After checkingconstraints from electroweak precision observables, we investigate theinfluence of the model on Higgs boson physics, notably on its production crosssection and decay branching fractions. Limits on the flavon $\varphi$ fromheavy Higgs boson searches at the LHC at 7 and 8 TeV are presented. Thebranching fractions of the flavon are computed as a function of the flavon massand the Higgs-flavon mixing angle. We also explore possible discovery of theflavon at 14 TeV, particularly via the $\varphi \rightarrow Z^0Z^0$ decaychannel in the $2\ell2\ell'$ final state, and through standard model Higgsboson pair production $\varphi \rightarrow hh$ in the $b\bar{b}\gamma\gamma$final state. We conclude that the flavon mass range up to $500$ GeV couldprobed down to quite small values of the Higgs-flavon mixing angle with 100fb$^{-1}$ of integrated luminosity at 14 TeV.

Higgs-flavon mixing and LHC phenomenology in a simplified model of broken flavor symmetry