1997/08/11 by Qiu-Yu Liu, Qiuyu Liu, Liu, Qiu-Yu
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Atmospheric Ozone and Climate #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9708308
15 pages, latex, uses epsfig and sprocl, talk given at the 4th International Solar Neutrino Conference, Heidelberg, Germany, April 8-14, 1997
arxiv created 1997/08/11 · openalex publication_date 1997/08/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Assuming three flavour neutrino mixing takes place in vacuum, we investigate the possibility that the solar νe take part in MSW transitions in the Sun due to Δm231 ∼ (10-7 - 10-4)~eV2, followed by long wave length vacuum oscillations on the way to the Earth, triggered by Δm221 (or Δm232) ∼ (10-12 - 10-10)~eV2. The solar νe survival probability is shown to be described in this case by a simple analytic expression. New ranges of neutrino parameters which allow to fit the solar neutrino data have been found. The best fit characterized by the minimum χ2 is extremely good. This hybrid (MSW+vacuum oscillations) solution of the solar neutrino problem leads to peculiar distortions of energy spectrum of the boron neutrinos which can be observed by the SuperKamiokande and SNO experiments. Other flavour scheme (e.g. 2 active νs + 1 sterile ν) can provide MSW+vacuum solution also.