Gauge see-saw: A mechanism for a light gauge boson
arXiv:1608.02708 · doi:10.1016/j.physletb.2017.01.058
Abstract
There has been rapidly growing interest in the past decade in a new gauge boson which is considerably lighter than the standard model Z boson. A well-known example of this kind is the so-called dark photon, and it is actively searched for in various experiments nowadays. It would be puzzling to have a new gauge boson which is neither massless nor electroweak scale, but possesses a rather small yet nonzero mass. We present a mechanism that can provide a light gauge boson as a result of a mass matrix diagonalization.
Version to appear in PLB