Decays of supernova neutrinos

Abstract

Supernova neutrinos could be well-suited for probing neutrino decay, since decay may be observed even for very small decay rates or coupling constants. We will introduce an effective operator framework for the combined description of neutrino decay and neutrino oscillations for supernova neutrinos, which can especially take into account two properties: One is the radially symmetric neutrino flux, allowing a decay product to be re-directed towards the observer even if the parent neutrino had a different original direction of propagation. The other is decoherence because of the long baselines for coherently produced neutrinos. We will demonstrate how to use this effective theory to calculate the time-dependent fluxes at the detector. In addition, we will show the implications of a Majoron-like decay model. As a result, we will demonstrate that for certain parameter values one may observe some effects which could also mimic signals similar to the ones expected from supernova models, making it in general harder to separate neutrino and supernova properties.

33 pages, 10 figures, Elsevier LaTeX. Final version to be published in Nuclear Physics B

References in corpus (5)

• A combined treatment of neutrino decay and neutrino oscillations
• Equivalence between Gaussian averaged neutrino oscillations and neutrino decoherence
• Generalized Bounds on Majoron-neutrino couplings
• MSW mediated neutrino decay and the solar neutrino problem
• Light Unstable Sterile Neutrino

Cited by in corpus (29)

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• Core-Collapse Astrophysics with a Five-Megaton Neutrino Detector
• Constraints on neutrino decay lifetime using long-baseline charged and neutral current data
• Supernova Constraints on Massive (Pseudo)Scalar Coupling to Neutrinos
• Decaying neutrinos and implications from the supernova relic neutrino observation
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• Visible Decay of Astrophysical Neutrinos at IceCube
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• Exploring a Non-Minimal Sterile Neutrino Model Involving Decay at IceCube and Beyond
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• Neutrino Spectrum from SN 1987A and from Cosmic Supernovae
• Interplay of energy dependent astrophysical neutrino flavor ratios and new physics effects
• Supernova prompt neutronization neutrinos and neutrino magnetic moments
• Tritium beta decay with additional emission of new light bosons
• Neutrino Invisible Decay at DUNE: a multi-channel analysis
• Constraining visible neutrino decay at KamLAND and JUNO
• Exploring invisible neutrino decay at ESSnuSB
• Searching for New Physics in Future Neutrino Factory Experiments
• Unstable Cosmic Neutrino Capture
• High-energy neutrino oscillations in absorbing matter
• Neutrino Properties from High Energy Astrophysical Neutrinos
• Probing neutrino decay scenarios by using the Earth matter effects on supernova neutrinos
• Lectures on neutrino phenomenology