Just So? Vacuum Oscillations and MSW: An Update

Abstract

We find that vacuum oscillations (VO), large-mixing-angle and small-mixing-angle MSW solutions to the solar neutrino problem (SNP) give all very good fits to the most recent results. Measurements of the ${}^7$Be flux can, in some cases, discriminate between different solutions to the SNP; in particular, VO allow ${}^7$Be fluxes almost as large as the one predicted by the SSM. We find that no evidence for seasonal variations can be extracted from present data, but that the large statistics of SuperKamiokande should make possible to study a significant portion of the presently allowed parameter space by just looking for seasonal variations. We also discuss the Borexino potential for detecting seasonal variations, which looks really impressive.

21 pages, ReVTeX, 15 figures as uuencoded compressed postscript files. The postscript file with the text and 14 figures (no figure 4) is available at ftp://risc0.ca.infn.it/pub/private/lissia/infncath9512.ps . To appear in Astroparticle Physics

References in corpus (6)

• Astrophysical Solutions are Incompatible with the Solar Neutrino Data
• How Many Solar Neutrino Experiments Are Wrong?
• Neutrinos from the Sun: experimental results confronted with solar models
• Vacuum oscillation solution to the solar neutrino problem in standard and non-standard pictures
• The MSW solution to the solar neutrino problem for non-standard solar models
• Progress and Prospects in Neutrino Astrophysics

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