EPP Theory Seminar: Daniel Egana-Ugrinovic: Spontaneous Flavor Violation
We present a new flavor spurion setup called Spontaneous Flavor Violation (SFV) that allows for significant couplings between new physics and any Standard Model quark generation,
while suppressing flavor changing neutral currents via flavor alignment. SFV is a robust and UV complete framework, and it can be applied to a broad set of theories, such as models of extended Higgs sectors, new gauge bosons, supersymmetry, axion-like particles and the Standard Model EFT expansion.
As an example, we apply this novel flavor Ansatz to an extended Higgs sector, showing that extra Higgs bosons as light as ~100 GeV with significant couplings to first or second generation quarks remain consistent with flavor and collider bounds. Such Higgs bosons may be copiously produced at LHC, and if they mix with the Standard Model Higgs they lead to significant enhancements of its couplings to light quarks, which may be probed at the LHC or at future colliders such at the ILC. The SFV Ansatz provides strong motivation to develop new techniques aimed at finding new physics with generation-specific couplings, such as light quark taggers at high energy colliders.