$\Psi$DM and the Bullet Cluster: Couple Inflaton to Higgs Field

Abstract

Electroweak theory is extended to $S{U}_L(2)\times U_Y(1)\times U_{\varphi }(1)$, where $U_{\varphi }(1)$ comes from the coupling of inflaton field to Higgs field. There arises an extremely light boson, $Y_{\mu }$. We resemble it as the wavelike dark matter, $\Psi$DM, through the dynamical analysis. The interactions of $Y_{\mu }$ may provide an explanation for the Bullet Cluster observations. Besides, a possible mechanism to produce $Y_{\mu }$ is discussed.