Mass varying neutrinos in supernovae
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Data
2011-09-21
Autores
Rossi-Torres, F. [UNESP]
Guzzo, M. M.
De Holanda, P. C.
Peres, O. L.G.
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We study the consequences on the neutrino oscillation parameter space, mixing angle (tan2θ), and vacuum mass difference (Δm02) when mass varying neutrino (MaVaN) models are assumed in a supernova environment. We consider electronic to sterile channels ν e→νs and ν̄e→ν ̄s in two-flavor scenario. In a given model of MaVaN mechanism, we induce a position-dependent effective mass difference, Δm2(r), where r is the distance from the supernova core, that changes the neutrino and antineutrino flavor conversion probabilities. We study the constraints on the mixing angle and vacuum mass difference coming from r-process and the SN1987A data. Our result is the appearance of a new exclusion region for very small mixing angles, tan2θ=10-6-10-2, and small vacuum mass difference, Δm02=1-20eV2, due the MaVaN mechanism. © 2011 American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 84, n. 5, 2011.