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29 March 2024
 
  » arxiv » astro-ph/9707097

 Article overview


Superkamiokande and solar antineutrinos
G. Fiorentini ; M. Moretti ; F. L. Villante ;
Date 8 Jul 1997
Journal Phys.Lett. B413 (1997) 378-381
Subject astro-ph hep-ph
Affiliation1,2), M. Moretti (1,2) and F. L. Villante (1,2) ( University of Ferrara - Italy, INFN - Sezione di Ferrara -Italy
AbstractWe propose to exploit the angular distribution of the positrons emitted in the inverse beta decay to extract a possible antineutrino signal from the Superkamiokande background. From the statistics collected in just 101.9 days one obtains a model independent upper bound on the antineutrino flux (for energy greater than 8.3 MeV) Phi < 9*10^4 cm^-2 s^-1 at the 95% C.L. By assuming the same energy spectrum as for the 8B neutrinos, the 95% C.L. bound is Phi < 6*10^4 cm^-2 s^-1. Within three years of data taking, the sensitivity to neutrino-antineutrino transition probability will reach the 1% level, thus providing a stringent test of hybrid oscillation models.
Source arXiv, astro-ph/9707097
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