Portal Connecting Dark Photons and Axions.
The dark photon and the axion (or axionlike 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.
Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon 34051, Korea.
Kunio
K
Kaneta
Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon 34051, Korea.
Hye-Sung
HS
Lee
Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon 34051, Korea.|Department of Physics, KAIST, Daejeon 34141, Korea.
Seokhoon
S
Yun