Transition Radiation of the Neutrino Toroid Dipole Moment

Abstract

We discuss the transition radiation of a neutrino induced by its toroid dipole moment ($\tau$) when crossing the interface between two different media with different refraction indices. A neutrino of 1 MeV energy emits approximately $10^{-40}$ keV at $\tau =e\sqrt{2}{G}_F/{\pi }^2$. This effect depends very slightly on the neutrino mass and has a finite value in the massless limit.

Comments: 8 pages and 4 EPS-figures included. use prd.sty, preprint.sty, aps.sty and epsfig.sty (RevTeX is used)