# B-physics anomalies: The bridge between R-parity violating Supersymmetry and flavoured Dark Matter

## TL;DR

This paper proposes a supersymmetric model with R-parity violation and a new flavoured dark matter candidate to explain B-physics anomalies, addressing experimental tensions and dark matter relic abundance.

## Contribution

It introduces a gauge singlet superfield that links B-physics anomalies with dark matter, providing a unified solution consistent with flavor and dark matter phenomenology.

## Key findings

- The model explains B-decay anomalies via new loop diagrams.
- It reproduces the observed dark matter relic abundance.
- The proposed framework remains testable at future experiments.

## Abstract

In recent years, significant experimental indications that point towards Lepton Flavour Universality violating effects in B-decays, involving $b \to c \tau \nu$ and $b \to s \ell^+ \ell^-$ have been accumulated. A possible New Physics explanation can be sought within the framework of R-parity violating Supersymmetry, which contains the necessary ingredients to explain the anomalies via both leptoquark, tree-level exchange and one-loop diagrams involving purely leptonic interactions. In addition, an approximate $U(2)^2$ flavour symmetry, that respects gauge coupling unification, successfully controls the strength of these interactions. Nevertheless strong constraints from leptonic processes and $Z$ boson decays exclude most of the relevant parameter space at the $2 \sigma$ level. Moreover, R-parity violation deprives Supersymmetry of its Dark Matter candidates. Motivated by these deficiencies, we introduce a new gauge singlet superfield, charged under the flavour symmetry and show that its third-generation, scalar component may participate in loop diagrams that alleviate the above-mentioned tensions, while at the same time reproduce the observed relic abundance. We obtain a solution to both anomalies that is also fully consistent with the rich Flavour and Dark Matter phenomenology. Finally, we assess the prospect to probe the model at future experiments.