Neutrinophilic DM annihilation in a model with $U(1)_{L_\mu-L_\tau} \times U(1)_{H}$ gauge symmetry

TL;DR

This paper introduces a model with two extra U(1) gauge symmetries to explain muon anomalies and dark matter, predicting a light neutrinophilic dark matter candidate testable by future experiments.

Contribution

The model uniquely combines $U(1)_{L_}-L_ au$ and $U(1)_H$ symmetries to address multiple phenomena including muon g-2, B-decays, and dark matter.

Findings

Proposes a light (~10 MeV) neutrinophilic dark matter candidate.

Explains muon anomalous magnetic moment and B-decay anomalies.

Predicts future detection prospects at Hyper-Kamiokande and JUNO.

Abstract

We propose a model with two different extra $U(1)$ gauge symmetries; muon minus tauon symmetry $U(1)_{{L_\mu}-L_{\tau}}$ and hidden symmetry $U(1)_H$. Then, we explain muon anomalous magnetic moment, semi-leptonic decays $b\to s\ell\bar\ell$, and dark matter. In particular, we find an intriguing dark matter candidate to be verified by Hyper-Kamiokande and JUNO in the future that request neutrinophilic DM with rather light dark matter mass$\sim{\cal O}(10)$ MeV.