{hacek C}erenkov Radiation by Neutrinos in a Supernova Core
- Theory Group, Physical Research Laboratory, Ahmedabad 380 009 (India)
Neutrinos with a magnetic dipole moment propagating in a medium with a velocity larger than the phase velocity of light emit photons by the {hacek C}erenkov process. The {hacek C}erenkov radiation is a helicity flip process via which a left-handed neutrino in a supernova core may change into a sterile right-handed one and free stream out of the core. Assuming that the luminosity of such sterile right-handed neutrinos is less than 10{sup 53}ergs/sec gives an upper bound on the neutrino magnetic dipole moment {mu}{sub {nu}}{lt}0.2{times}10{sup {minus}13}{mu}{sub {ital B}}. This is 2 orders of magnitude more stringent than the previously established bounds on {mu}{sub {nu}} from considerations of supernova cooling rate by right-handed neutrinos. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 286765
- Journal Information:
- Physical Review Letters, Vol. 77, Issue 5; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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