Comment on "Cherenkov Radiation by Neutrinos in a Supernova Core"

Details Comment on "Cherenkov Radiation by Neutrinos in a Supernova Core" Comment on "Cherenkov Radiation by Neutrinos in a Supernova Core"

1997-04-18

arxiv.org/abs/hep-ph/9704352v1

Phys.Rev.Lett. 79 (1997) 773-774

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pages, REVTEX. Submitted as a Comment to PRL

Scientific paper

10.1103/PhysRevLett.79.773

Mohanty and Samal have shown that the magnetic-moment interaction with nucleons contributes significantly to the photon dispersion relation in a supernova core, and with an opposite sign relative to the usual plasma effect. Because of a numerical error they overestimated the magnetic-moment term by two orders of magnitude, but it is still of the same order as the plasma effect. It appears that the Cherenkov processes gamma+nu -> nu and nu -> nu+gamma remain forbidden, but a final verdict depends on a more detailed investigation of the dynamical magnetic susceptibility of a hot nuclear medium.

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