Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/58869
Type: Artigo de periódico
Title: Random magnetic fields inducing solar neutrino spin-flavor precession in a three generation context
Author: Guzzo, MM
de Holanda, PC
Peres, OLG
Abstract: We study the effect of random magnetic fields in the spin-flavor precession of solar neutrinos in a three generation context, when a nonvanishing transition magnetic moment is assumed. While this kind of precession is strongly constrained when the magnetic moment involves the first family, such constraints do not apply if we suppose a transition magnetic moment between the second and third families. In this scenario we can have a large nonelectron antineutrino flux arriving on Earth, which can lead to some interesting phenomenological consequences, as, for instance, the suppression of day-night asymmetry. We have analyzed the high-energy solar neutrino data and the KamLAND experiment to constrain the solar mixing angle, theta, and solar mass difference, Delta m(2), and we have found a large shift of allowed values. Also, sizable effects in the Borexino experiment are expected which can discriminate this scenario and standard large mixing angle solution to the solar neutrino problem.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.72.073004
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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