Gauging the Way to MFV

TL;DR

This paper introduces a UV complete model with gauged flavor symmetry that realizes holomorphic MFV in RPV supersymmetry, suppresses dangerous operators, and predicts potentially observable flavor gauge bosons at the LHC.

Contribution

It presents a novel gauged flavor symmetry model that spontaneously breaks flavor symmetry, cancels anomalies with minimal exotic content, and connects MFV with RPV SUSY in a consistent framework.

Findings

Flavor gauge bosons have an inverted hierarchy, making third-generation bosons the lightest.

The model suppresses dangerous RPV operators, allowing for viable phenomenology.

Corrections to MFV are controlled, and the model remains consistent in large parameter regions.

Abstract

We present a UV complete model with a gauged flavor symmetry which approximately realizes holomorphic Minimal Flavor Violation (MFV) in R-parity violating (RPV) supersymmetry. Previous work has shown that imposing MFV as an ansatz easily evades direct constraints and has interesting collider phenomenology. The model in this work spontaneously breaks the flavor symmetry and features the minimum "exotic" field content needed to cancel anomalies. The flavor gauge bosons exhibit an inverted hierarchy so that those associated with the third generation are the lightest. This allows low energy flavor constraints to be easily satisfied and leaves open the possibility of flavor gauge bosons accessible at the LHC. The usual MSSM RPV operators are all forbidden by the new gauge symmetry, but the model allows a purely "exotic" operator which violates both R-parity and baryon number. Since the exotic fields mix with MSSM-like right handed quarks, diagonalizing the full mass matrix after flavor-breaking transforms this operator into the trilinear baryon number violating operator UDD with flavor coefficients all suppressed by three powers of Yukawa couplings. There is a limit where this model realizes exact MFV; we compute corrections away from MFV, show that they are under theoretical control, and find that the model is viable in large regions of parameter space.