The Earth effects on the supernova neutrino spectra

Details The Earth effects on the supernova neutrino spectra The Earth effects on the supernova neutrino spectra

2000-12-28

arxiv.org/abs/hep-ph/0012354v4

Phys.Lett. B510 (2001) 189-196

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 6 figures, corrected version

Scientific paper

10.1016/S0370-2693(01)00610-4

The Earth effects on the energy spectra of supernova neutrinos are studied. We analyze numerically the time-integrated energy spectra of neutrino in a mantle-core-mantle step function model of the Earth's matter density profile. We consider a realistic frame-work in which there are three active neutrinos whose mass squared differences and mixings are constrained by the present understanding of solar and atmospheric neutrinos. We find that the energy spectra change for some allowed mixing parameters. Especially, the expected number of events at SNO shows characteristic behavior with respect to energy, i.e. a great dip and peak. We show that observations of the Earth effect allow us to identify the solar neutrino solution and to probe the mixing angle $\theta_{2}$.

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