Search for matter-dependent atmospheric neutrino oscillations in Super-Kamiokande
- Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205 (Japan)
- Department of Physics, Okayama University, Okayama, Okayama 700-8530 (Japan)
We consider {nu}{sub {mu}}{yields}{nu}{sub {tau}} oscillations in the context of the mass varying neutrino (MaVaN) model, where the neutrino mass can vary depending on the electron density along the flight path of the neutrino. Our analysis assumes a mechanism with dependence only upon the electron density, hence ordinary matter density, of the medium through which the neutrino travels. Fully-contained, partially-contained and upward-going muon atmospheric neutrino data from the Super-Kamiokande detector, taken from the entire SK-I period of 1489 live days, are compared to MaVaN model predictions. We find that, for the case of 2-flavor oscillations, and for the specific models tested, oscillation independent of electron density is favored over density dependence. Assuming maximal mixing, the best-fit case and the density-independent case do not differ significantly.
- OSTI ID:
- 21249680
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 5; Other Information: DOI: 10.1103/PhysRevD.77.052001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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