Portal Connecting Dark Photons and Axions

Abstract

The dark photon and the axion (or axion-like particle) are popular light particles of the hidden sector. Each of them has been actively searched for through the couplings called the vector portal and the axion portal. We introduce a new portal connecting the dark photon and the axion (axion--photon--dark photon, axion--dark photon--dark photon), which emerges in the presence of the two particles. This dark axion portal is genuinely new couplings, not just from a product of the vector portal and the axion portal, because of the internal structure of these couplings. We present a simple model that realizes the dark axion portal and discuss why it warrants a rich phenomenology.

Version accepted for publication in Phys. Rev. Lett

References in corpus (6)

• A Theory of Dark Matter
• Secluded U(1) below the weak scale
• Illuminating Dark Photons with High-Energy Colliders
• Bosonic super-WIMPs as keV-scale dark matter
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Higgs boson decays to four fermions through an abelian hidden sector

Cited by in corpus (6)

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Dark photon relic dark matter production through the dark axion portal
• QCD $\theta$-vacuum energy and axion properties
• Supernova constraints on an axion-photon-dark photon interaction
• New searches at the reactor experiments based on the dark axion portal
• Conformal Portal to Dark Matter