Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/12504
 Title: Four-neutrino oscillation solutions of the solar neutrino problem Author: Giunti, CarloGonzález García, Ma. ConcepciónPeña-Garay, C. Keywords: Astrofísica nuclearCol·lisions (Física nuclear)Particles (Nuclear physics)Neutrins solarsNuclear astrophysicsCollisions (Nuclear physics)Particles (Nuclear physics)Solar neutrinos Issue Date: 2000 Publisher: The American Physical Society Abstract: 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. Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.62.013005 It is part of: Physical Review D, 2000, vol. 62, núm. 1, p. 013005-1-013005-13 Related resource: http://dx.doi.org/10.1103/PhysRevD.62.013005 URI: http://hdl.handle.net/2445/12504 ISSN: 0556-2821 Appears in Collections: Articles publicats en revistes (Física Quàntica i Astrofísica)

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