Earth matter effect in Be solar neutrino experiments

André De Gouvêa*, Alexander Friedland, Hitoshi Murayama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We determine the sensitivity of the KamLAND and Borexino experiments to the neutrino regeneration effect in the Earth as a function of Δm2 and θ, using realistic numbers for the signal and background rates. We compare the results obtained with the χ2 method with those obtained from the conventional day-night asymmetry analysis. We also investigate how well one should be able to measure the neutrino oscillation parameters if a large day-night asymmetry is observed, taking the LOW solution as an example. We present an enlarged parameter space, which contains mixing angles greater than π/4 where the heavy mass eigenstate is predominantly νe, and determine the electron neutrino survival probability for this traditionally neglected scenario. We point out that this portion of the parameter space yields different physics results when dealing with the MSW solutions to the solar neutrino puzzle and should not be neglected.

Original languageEnglish (US)
JournalJournal of High Energy Physics
Issue number3
StatePublished - Dec 1 2001


  • Neutrino Physics
  • Solar and Atmospheric Neutrinos

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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