Determining the Flavour Content of the Low-Energy Solar Neutrino Flux
Andre de Gouvea, Hitoshi Murayama
Abstract
We study the sensitivity of the HELLAZ and Borexino solar neutrino experiments on discriminating the neutrino species nue, anti-nue, numu,tau, anti-numu,tau, and nusterile using the difference in the recoil electron kinetic energy spectra in elastic neutrino-electron scattering. We find that one can observe a non-vanishing numu,tau component in the solar neutrino flux, especially when the nue survival probability is low. Also, if the data turn out to be consistent with nue <-> numu,tau oscillations, an anti-nue component can be excluded effectively.
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