Neutrino Oscillations and the Supernova 1987A Signal

Abstract

We study the impact of neutrino oscillations on the interpretation of the supernova (SN) 1987A neutrino signal by means of a maximum-likelihood analysis. We focus on oscillations between ${\overline{\nu }}_e$ with ${\overline{\nu }}_{\mu }$ or ${\overline{\nu }}_{\tau }$ with those mixing parameters that would solve the solar neutrino problem. For the small-angle MSW solution ($\Delta m^2\approx 10^{-5}\mathrm{e}{\mathrm{V}}^2$, ${\sin }^{2}2{\Theta }_0\approx 0.007$), there are no significant oscillation effects on the Kelvin-Helmholtz cooling signal; we confirm previous best-fit values for the neutron-star binding energy and average spectral ${\overline{\nu }}_e$ temperature. There is only marginal overlap between the upper end of the 95.4\% CL inferred range of $⟨E_{{\overline{\nu }}_e}⟩$ and the lower end of the range of theoretical predictions. Any admixture of the stiffer ${\overline{\nu }}_{\mu }$ spectrum by oscillations aggravates the conflict between experimentally inferred and theoretically predicted spectral properties. For mixing parameters in the neighborhood of the large-angle MSW solution ($\Delta m^2\approx 10^{-5}\mathrm{e}{\mathrm{V}}^2$, ${\sin }^{2}2{\Theta }_0\approx 0.7$) the oscillations in the SN are adiabatic, but one needs to include the regeneration effect in the Earth which causes the Kamiokande and IMB detectors to observe different ${\overline{\nu }}_e$ spectra. For the solar vacuum solution ($\Delta m^2\approx 10^{-10}\mathrm{e}{\mathrm{V}}^2$, ${\sin }^{2}2{\Theta }_0\approx 1$) the oscillations in the SN are nonadiabatic; vacuum oscillations take place between the SN and the detector. If either of the large-angle solutions were borne out by the upcoming round of solar neutrino experiments, one would have to conclude that the SN~1987A ${\overline{\nu }}_{\mu }$ and/or ${\overline{\nu }}_e$ spectra had been much softer than predicted by current

Final version with very minor wording changes, to be published in Phys. Rev. D

Cited by in corpus (100)

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• Supernova Relic Neutrino Search at Super-Kamiokande
• Neutrino oscillations and signals in beta and 0nu2beta experiments
• Detection of Neutrinos from Supernovae in Nearby Galaxies
• Constraining URCA cooling of neutron stars from the neutron radius of 208Pb
• Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
• LSND, SN1987A, and CPT Violation
• Probing the neutrino mass hierarchy and the 13-mixing with supernovae
• Search for Supernova Neutrino Bursts at Super-Kamiokande
• The Progenitor Dependence of the Preexplosion Neutrino Emission in Core-Collapse Supernovae
• Improved analysis of SN1987A antineutrino events
• Can a supernova be located by its neutrinos?
• Supernova Bounds on Majoron-emitting decays of light neutrinos
• The likelihood of GODs' existence: Improving the SN1987a constraint on the size of large compact dimensions
• Black Hole Formation in Core-Collapse Supernovae and Time-of-Flight Measurements of the Neutrino Masses
• Diffuse Supernova Neutrino Background Search at Super-Kamiokande
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• Diffuse supernova neutrinos at underground laboratories
• Neutrino Mass Spectrum and Future Beta Decay Experiments
• Inverted Hierarchy of Neutrino Masses Disfavored by Supernova 1987A
• Core-Collapse Astrophysics with a Five-Megaton Neutrino Detector
• Strong Supernova 1987A Constraints on Bosons Decaying to Neutrinos
• Earth matter effects in supernova neutrinos: Optimal detector locations
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• Structure of neutrino mass matrix and CP violation
• Shock propagation and neutrino oscillation in supernova
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• Search for Supernova Neutrino-Bursts with the AMANDA Detector
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• Supernova Simulations Confront SN 1987A Neutrinos
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• Comparative analysis of SN1987A antineutrino fluence
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• Neutrinos from SN1987A: flavor conversion and interpretation of results
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• Neutrino Spectrum from SN 1987A and from Cosmic Supernovae
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• Nucleosynthesis in Supernovae
• New Test of Supernova Electron Neutrino Emission using Sudbury Neutrino Observatory Sensitivity to the Diffuse Supernova Neutrino Background
• Potential for Supernova Neutrino Detection in MiniBooNE
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• SN1987A still shining: A Quest for Pseudo-Dirac Neutrinos
• Physics with Supernovae
• The likelihood for supernova neutrino analyses
• Interplay of Non-Relativistic and Relativistic Effects in Neutrino Oscillations
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• SN1987A constraints to BSM models with extra neutral bosons near the trapping regime: $U(1{)}_{L_{\mu }-L_{\tau }}$ model as an illustrative example
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• SN1987A cooling due to Plasmon-Plasmon scattering in the Randall-Sundrum Model