Electroweak Axion as the Fuzzy Dark Matter -- A Proposal for the Mixed Fuzzy and Cold Dark Matters

TL;DR

This paper proposes a model where the electroweak axion acts as fuzzy dark matter with ultralight mass, predicting a dual dark matter composition and novel interactions affecting photon behavior and proton decay.

Contribution

It introduces a new model linking electroweak axions to fuzzy dark matter, predicting dual dark matter components and specific interactions not previously considered.

Findings

Electroweak axion identified as fuzzy dark matter with mass ~10^{-20}--10^{-19} eV

Predicts two dark matter components: ultralight and WIMP-like

Suggests Chern-Simons interactions and proton decay signatures

Abstract

The electroweak axion is identified with the fuzzy dark matter of a mass $m\simeq 10^{-20}$--$10^{-19}\,{\rm eV}$. The model predicts two components of dark matter, one is ultralight and the other is WIMP-like. The Chern-Simons-type interaction between the fuzzy dark matter and photon and the $B+L$ breaking proton decays are predicted.