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We consider two copies of the Standard Model, interchanged by an exact paritysymmetry, P. The observed fermion mass hierarchy is described by suppressionfactors $\epsilon^{n_i}$ for charged fermion $i$, as can arise inFroggatt-Nielsen and extra-dimensional theories of flavor. The correspondingflavor factors in the mirror sector are $\epsilon'^{n_i}$, so that spontaneousbreaking of the parity P arises from a single parameter $\epsilon'/\epsilon$,yielding a tightly constrained version of Minimal Mirror Twin Higgs, introducedin our previous paper. Models are studied for simple values of $n_i$, includingin particular one with SU(5)-compatibility, that describe the observed fermionmass hierarchy. The entire mirror quark and charged lepton spectrum is broadlypredicted in terms of $\epsilon'/\epsilon$, as are the mirror QCD scale and thedecoupling temperature between the two sectors. Helium-, hydrogen- andneutron-like mirror dark matter candidates are constrained by self-scatteringand relic ionization. In each case, the allowed parameter space can be fullyprobed by proposed direct detection experiments. Correlated predictions aremade as well for the Higgs signal strength and the amount of dark radiation.

Effective Theory of Flavor for Minimal Mirror Twin Higgs