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