On Stringy Origin of Minimal Flavor Violation

Abstract

We study the minimal flavor violation in the context of string effective field theory. Stringy selection rules indicate that $n$-point couplings among fermionic zero-modes and lightest scalar modes in the string effective action are given by a product of Yukawa couplings which are regarded as spurion fields of stringy and geometrical symmetries. Hence, Yukawa couplings determine the dynamics of flavor and CP violations. This observation strongly supports the hypothesis of minimal flavor violation in the Standard Model effective field theory.

6 pages, v2: published version

References in corpus (8)

• Spacetime Instanton Corrections in 4D String Vacua - The Seesaw Mechanism for D-Brane Models
• Neutrino Majorana Masses from String Theory Instanton Effects
• Stringy origin of non-Abelian discrete flavor symmetries
• With or without U(2)? Probing non-standard flavor and helicity structures in semileptonic B decays
• Metaplectic Flavor Symmetries from Magnetized Tori
• Higher Order Couplings in Magnetized Brane Models
• Higher Order Couplings from Heterotic Orbifold Theory
• Symplectic modular symmetry in heterotic string vacua: flavor, CP, and $R$-symmetries

Cited by in corpus (7)

• Residual flavor symmetry breaking in the landscape of modular flavor models
• $A_4$ Modular Flavour Model of Quark Mass Hierarchies close to the Fixed Point $\tau =\omega$
• Modular symmetry in the SMEFT
• 4D modular flavor symmetric models inspired by higher dimensional theory
• Lepton mass matrix from double covering of $A_4$ modular flavor symmetry
• Neutrino masses and mixing in Minimal Inverse Seesaw using $A_4$ modular symmetry
• Generalized Matter Parities from Finite Modular Symmetries