Título:
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Four-neutrino oscillation solutions of the solar neutrino problem
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Autor/a:
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Giunti, Carlo; González García, Ma. Concepción; Peña-Garay, C.
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Otros autores:
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Universitat de Barcelona |
Abstract:
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We present an analysis of the neutrino oscillation solutions of the solar neutrino problem in the framework of four-neutrino mixing where a sterile neutrino is added to the three standard ones. We perform a fit to the full data set corresponding to the 825-day Super-Kamiokande data sample as well as to Chlorine, GALLEX and SAGE and Kamiokande experiments. In our analysis we use all measured total event rates as well as all Super-Kamiokande data on the zenith angle dependence and the recoil electron energy spectrum. We consider both transitions via the Mikheyev-Smirnov-Wolfenstein (MSW) mechanism as well as oscillations in vacuum (just-so) and find the allowed solutions for different values of the additional mixing angles. This framework permits transitions into active or sterile neutrinos controlled by the additional parameter $\cos^2(\vartheta_{23}) \cos^2(\vartheta_{24})$ . We discuss the maximum allowed values of this additional mixing parameter for the different solutions. |
Materia(s):
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-Astrofísica nuclear -Col·lisions (Física nuclear) -Particles (Nuclear physics) -Neutrins solars -Nuclear astrophysics -Collisions (Nuclear physics) -Particles (Nuclear physics) -Solar neutrinos |
Derechos:
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(c) The American Physical Society, 2000
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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The American Physical Society
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