Flavor hierarchies with nonminimal irreducible representations

We propose a new class of flavor models in which the spurion that breaks Standard Model flavor symmetries transforms in a nonminimal representation. Hierarchies in fermion masses, which arise from multiple insertions of this spurion, may be generated in a technically natural, accidental manner, from a handful of untuned <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi mathvariant="script">O</a:mi> <a:mo stretchy="false">(</a:mo> <a:mn>1</a:mn> <a:mo stretchy="false">)</a:mo> </a:math> elements in the UV. This relies explicitly on the non-Abelian nature of the symmetry, distinguishing it from standard Froggatt-Nielsen-like scenarios. The pattern of flavor violating operators at dimension-6 can radically differ from previously considered scenarios, and emphasises the need for a broad flavor program across all generations.