New Variables For Neutrino Oscillation Diagnostics at Superkamiokande and the Sudbury Neutrino Observatory

Abstract

The SuperKamiokande collaboration has presented results on the observation of solar neutrinos. The Sudbury Neutrino Observatory (SNO) is also expected to go on-line in the near future. We propose several new variables, insensitive to the absolute flux of the initial solar neutrino beam, which probe the shape of the observed spectrum at these experiments and can sensitively signal neutrino oscillations. One class of such variables involves normalised moments of the distributions recorded at the two facilities while another variable, specific to SNO, depends on the integrated charged and neutral current signals. The utility of these variables in the context of supernova neutrinos, both from the collapse epoch and the post-bounce era, is also emphasised. It is shown that, notwithstanding the imprecise nature of the information about the initial neutrino spectra from a supernova, oscillations can be detected using these variables and it will be possible to distinguish between the alternatives of oscillation to a sequential neutrino {\em vis-a-vis} that to a sterile neutrino.

33 Pages LaTeX, 10 postscript figures

References in corpus (10)

• Evidence for oscillation of atmospheric neutrinos
• Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days
• Measurement of the solar neutrino energy spectrum using neutrino-electron scattering
• Tau Neutrino Appearance with a 1000 Megaparsec Baseline
• Mass signature of supernova ${\nu }_{\mu }$ and ${\nu }_{\tau }$ neutrinos in SuperKamiokande
• Mass signature of supernova ${\nu }_{\mu }$ and ${\nu }_{\tau }$ neutrinos in the Sudbury Neutrino Observatory
• Electron Neutrino Mass Measurement by Supernova Neutrino Bursts and Implications on Hot Dark Matter
• Effect of Flavour Oscillations on the Detection of Supernova Neutrinos
• Neutrino mixing from neutrino oscillation data
• Solar Neutrino Oscillation Diagnostics at Superkamiokande and Sno

Cited by in corpus (2)

• Identifying the neutrino mass spectrum from a supernova neutrino burst
• Solar Neutrino Rates, Spectrum, and its Moments : an MSW Analysis in the Light of Super-Kamiokande Results