Dark Matter emission at Belle II and NA62 in Minimal Flavor Violation framework

TL;DR

This paper explores flavored dark matter within the Minimal Flavor Violation framework, showing it can explain certain rare meson decay excesses and emphasizing its testability through flavor experiments.

Contribution

It demonstrates how MFV-based flavored dark matter models can account for specific decay anomalies and discusses their experimental implications.

Findings

MFV flavored dark matter can explain $K^+ o \pi^+ u ar{ u}$ excess

It can also account for $B^+ o K^+ u ar{ u}$ anomalies

A minimal setup with one dark matter multiplet cannot explain both simultaneously

Abstract

Minimal Flavor Violation (MFV) provides a compelling framework for exploring physics beyond the Standard Model, in which new QCD-singlet fields transforming under the global $\mathrm{SU}(3)^3$ quark flavor symmetry can naturally be stable and act as dark matter (DM) candidates. We show that the DM-MFV framework naturally accommodates the excess in either $K^+ \to \pi^+ \nu \bar{\nu}$ or $B^+ \to K^+ \nu \bar{\nu}$, while a unified explanation of both channels simultaneously cannot be achieved within a minimal setup containing only a single dark matter multiplet with nearly degenerate masses. Overall, our findings underscore the intricate interplay between MFV-based model building, flavored dark matter scenarios, and precision flavor experiments, highlighting flavored dark matter as a framework that is both theoretically robust and experimentally testable.