Neutrinos from Stellar Collapse: Comparison of the effects of three and four flavour mixings

Abstract

We study the effect of non-vanishing masses and mixings among neutrino flavours on the detection of neutrinos from stellar collapse by a water Cerenkov detector. We consider a frame-work in which there are four neutrino flavours, including a sterile neutrino, whose mass squared differences and mixings are constrained by the present understanding of solar, atmospheric and laboratory neutrino detection. We also include the effects of high density matter within the supernova core. Unlike in the three flavour scenario, we find that the number of events due to the dominant process involving electron-antineutrinos changes dramatically for some allowed mixing parameters. Furthermore, contributions from charged-current scattering off oxygen nuclei in the detector can be considerably enhanced due to flavour mixing. We also present a comparison between the two possible scenarios, namely, when only three active neutrino flavours are present and when they are accompanied by a fourth sterile neutrino.

25 pages, 5 EPS figures

References in corpus (8)

• Limits on Neutrino Oscillations from the CHOOZ Experiment
• Identifying the neutrino mass spectrum from a supernova neutrino burst
• Non-adiabatic Level Crossing in Resonant Neutrino Oscillations
• Super-Kamiokande data and atmospheric neutrino decay
• Neutrinos from Stellar Collapse: Effects of flavour mixing
• Effects of neutrino temperatures and mass hierarchies on the detection of supernova neutrinos
• Establishing a nu_{mu,tau} Component in the Solar Neutrino Flux
• Effect of flavor mixing on the time delay of massive supernova neutrinos

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• What Can Be Learned with a Lead-Based Supernova-Neutrino Detector?
• Neutrinos from SN1987A, Earth matter effects and the LMA solution of the solar neutrino problem
• Supernova neutrino oscillations: A simple analytical approach
• Supernova neutrinos: difference of nu_mu - nu_tau fluxes and conversion effects
• Probing neutrino oscillations from supernovae shock waves via the IceCube detector
• SN1987A and the properties of neutrino burst
• Gravity Wave and Neutrino Bursts from Stellar Collapse: A Sensitive Test of Neutrino Masses
• Supernova Neutrino Spectra and Applications to Flavor Oscillations
• Neutrinos from Stellar Collapse: Comparison of signatures in water and heavy water detectors
• Sum rules of four-neutrino mixing in matter
• Neutrinos from Supernovae