Oscillation Effects On Neutrinos From The Early Phase Of a Nearby Supernova

Details Oscillation Effects On Neutrinos From The Early Phase Of a Nearby Supernova Oscillation Effects On Neutrinos From The Early Phase Of a Nearby Supernova

1998-07-10

arxiv.org/abs/astro-ph/9807100v1

Int.J.Mod.Phys. A15 (2000) 2105-2120

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1142/S0217751X00000872

Neutrinos emitted during stellar core collapse leading to a supernova are primarily of the electron neutrino type at source which may undergo oscillation between flavor eigenstates during propagation to an earth-bound detector. Although the number of neutrinos emitted during the pre-bounce collapse phase is much smaller than that emitted in the post-bounce phase (in which all flavors of neutrinos are emitted), a nearby supernova event may nevertheless register a substantial number of detections from the pre-bounce phase at SuperKamiokande (SK) and the Sudbury Neutrino Observatory (SNO). The calorimetric measurement of the supernova neutrino fluence from this stage via the charge current and neutral current detection channels in SNO and the corresponding distortion of detected spectrum in SK over the no-oscillation spectrum, can probe information about neutrino mass difference and mixing which are illustrated here in terms of two- and three-flavor oscillation models.

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