Flavor anomalies and dark matter in SUSY with an extra U(1)

TL;DR

This paper proposes a supersymmetric model with an extra U(1) gauge symmetry to address recent flavor anomalies, muon g-2 deviation, and dark matter, compatible with current experimental constraints.

Contribution

It introduces a SUSY model with an $L_ - L_$ gauge symmetry and vector-like fermions, unifying flavor anomalies, muon g-2, and dark matter explanations.

Findings

Model explains $b ightarrow s$ anomalies and muon g-2 simultaneously.

Dark matter candidate includes a 1 TeV higgsino compatible with observations.

Model remains consistent with LHC and flavor constraints.

Abstract

Motivated by the recent anomalies in $b\rightarrow s$ transitions that emerged at LHCb, we consider a model with an $L_\mu - L_\tau$ gauge symmetry and additional vector-like fermions. We find that by introducing supersymmetry the model can be made consistent with the long-standing deviation in the measured value of the anomalous magnetic moment of the muon, $g-2$, and neutralino dark matter of broad mass ranges and properties. In particular, dark matter candidates include the well-known 1 TeV higgsino, which in the MSSM is typically not compatible with solutions to the $g-2$ puzzle. Moreover, its spin-independent cross section could be at the origin of the recent small excess in XENON-1T data. We apply to the model constraints arising from flavor precision measurements and direct searches at the Large Hadron Collider and show that they do not currently exclude the relevant parameter space regions.