Spectral split in prompt supernova neutrino burst: Analytic three-flavor treatment
arXiv:0801.1660 · doi:10.1103/PhysRevD.77.113007
Abstract
The prompt nu_e burst from a core-collapse supernova (SN) is subject to both matter-induced flavor conversions and strong neutrino-neutrino refractive effects. For the lowest-mass progenitors, leading to O-Ne-Mg core SNe, the matter density profile can be so shallow that the usual MSW matter effects occur within the dense-neutrino region close to the neutrino sphere. In this case a ``split'' occurs in the emerging spectrum, i.e., the nu_e flavor survival probability shows a step-like feature. We explain this feature analytically as a ``MSW prepared spectral split.'' In a three-flavor treatment, the step-like feature actually consists of two narrowly spaced splits. They are determined by two combinations of flavor-lepton numbers that are conserved under collective oscillations.
Revised version (14 pages, 10 eps figures) to appear in Physical Review D. Text clarified, Figure 2 improved
References in corpus (13)
- Analysis of Collective Neutrino Flavor Transformation in Supernovae
- Adiabaticity and spectral splits in collective neutrino transformations
- Decoherence in supernova neutrino transformations suppressed by deleptonization
- Neutrino Mass Hierarchy and Stepwise Spectral Swapping of Supernova Neutrino Flavors
- Self-induced decoherence in dense neutrino gases
- Flavor Evolution of the Neutronization Neutrino Burst from an O-Ne-Mg Core-Collapse Supernova
- Simple Picture for Neutrino Flavor Transformation in Supernovae
- Stepwise Spectral Swapping with Three Neutrino Flavors
- Connection between supernova shocks, flavor transformation, and the neutrino signal
- Possible CP-Violation effects in core-collapse Supernovae
- Liouville equations for neutrino distribution matrices
- "Classical" instabilities and "quantum" speed-up in the evolution of neutrino clouds
- Neutrinos from a core collapse supernova