U(2) and MFV in Supersymmetry

TL;DR

This paper explores a U(2)^3 flavor symmetry in supersymmetry, showing it can naturally explain meson mixing phenomena and align with recent experimental data, while predicting specific superpartner mass ranges.

Contribution

It introduces a U(2)^3 symmetry framework as a natural extension of Minimal Flavour Violation for hierarchical squark spectra, linking flavor observables with superpartner masses.

Findings

Correlation between meson mixing amplitudes in K, B(d), B(s) systems.

Resolution of current CKM fit tensions.

Prediction of TeV-scale sbottom and gluino masses.

Abstract

A suitably broken U(2)^3 symmetry acting on the first two generations of quarks and squarks is studied as a natural generalization of the Minimal Flavour Violation principle to the case of a hierarchical squark spectrum. A definite correlation emerges between the meson mixing amplitudes in the K, B(d) and B(s) systems which can resolve the current tension in CKM fits, while predicting a moderate enhancement of the B(s) mixing phase, in agreement with recent data from the LHCb experiment, as well as sbottom and gluino masses in the TeV region.