Low-energy Anti-neutrinos from the Sun

Abstract

We consider the sensitivity of future neutrino experiments in the low energy region, such as BOREXINO or HELLAZ, to a solar electron antineutrino signal. We show that, if neutrino conversions within the Sun result in partial polarization of initial solar neutrino fluxes, then a new opportunity arises to observe the electron antineutrinos and thus to probe the Majorana nature of the neutrinos. This is achieved by comparing the slopes of the energy dependence of the differential neutrino electron scattering cross section for different neutrino conversion scenarios. We also show how the ν_e -> \barν_e conversions may take place for low energy solar neutrinos while being unobservable at the Kamiokande and Super-Kamiokande experiments.

LaTeX, 14 pages, 3 PS figures included, 3 references added

References in corpus (1)

• Superkamiokande and solar antineutrinos

Cited by in corpus (11)

• Particle Physics from Stars
• A High Sensitivity Search for ${\bar{\nu }}_e$'s from the Sun and Other Sources at KamLAND
• Solar neutrino oscillations and bounds on neutrino magnetic moment and solar magnetic field
• Current Status of the Resonant Spin-Flavor Precession Solution to the Solar Neutrino Problem
• Appearance of neutronization peak and decaying supernova neutrinos
• Distinguishing magnetic moment from oscillation solutions of the solar neutrino problem with Borexino
• Neutrino Spin Flavour Precession in Fluctuating Solar Magnetic Fields
• Scattering processes could distinguish Majorana from Dirac neutrinos
• Implications of Solar and Atmospheric Neutrinos
• Neutrino conversions in random magnetic fields and ${\tilde{\nu }}_e$ from the Sun
• Neutrino Spin-Flavor Conversions and Electron Antineutrino emission from the Sun with Random Magnetic Field