2011/06/12 by Ara Ioannisian, A. N. Ioannisian, D.A. Ioannisian +6
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #astro-ph.HE #hep-ph
paper · pdf · doi:10.48550/arxiv.1106.2285
invited talk, to appear in the proceedings of the XLVIth Rencontres de Moriond EW 2011
arxiv created 2011/06/12 · arxiv updated 2011/11/09
We discuss the transition radiation process ν→ νγ at an interface of two media. The medium fulfills the dual purpose of inducing an effective neutrino-photon vertex and of modifying the photon dispersion relation. The transition radiation occurs when at least one of those quantities have different values in different media. We present a result for the probability of the transition radiation which is both accurate and analytic. For Eν=1MeV neutrino crossing polyethylene-vacuum interface the transition radiation probability is about 10-39 and the energy intensity (deposition) is about 10-34eV. At the surface of the neutron stars the transition radiation probability may be ∼ 10-20. Our result on three orders of magnitude is larger than the results of previous calculations.