Quasi-degenerate dark photon and dark matter

Abstract

We introduce an $SU(2{)}_X^{}$ dark sector without any fermions and then realize a non-abelian kinetic mixing between the dark $SU(2{)}_X^{}$ gauge fields and the standard model $SU(2{)}_L^{}\times U(1{)}_Y^{}$ gauge fields. While one of the dark gauge bosons becomes a dark photon, the others can keep stable to form a dark matter particle. The nearly degenerate masses of dark photon and dark matter could be tested if the dark photon and the dark matter are both observed in the future.

arXiv comment5 pages