In astrophysical environments such as core-collapse supernovae and neutron star-neutron star or neutron star-black hole mergers where dense neutrino media are present, matter-neutrino resonances (MNRs) can occur when the neutrino propagation potentials due to neutrino-electron and neutrino-neutrino forward scattering nearly cancel each other. We show that neutrino flavor transformation through MNRs can be explained by multiple adiabatic solutions similar to the Mikheyev-Smirnov-Wolfenstein mechanism. We find that for the normal neutrino mass hierarchy, neutrino flavor evolution through MNRs can be sensitive to the shape of neutrino spectra and the adiabaticity of the system, but such sensitivity is absent for the inverted hierarchy.
|Original language||English (US)|
|Number of pages||6|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Jan 10 2016|
Bibliographical noteFunding Information:
This work was partly supported by the Helmholtz Association (HGF) through the Nuclear Astrophysics Virtual Institute ( VH-VI-417 ) and by the US DOE (EPSCoR grant DE-SC0008142 at UNM and grant DE-FG02-87ER40328 at UMN). We thank A. Friedland, G. McLaughlin and D. Vaananen for useful discussions. We also thank the INPAC at Shanghai Jiao Tong University, China for hospitality and support of the Study Group on Neutrino & Nuclear Physics for Nucleosynthesis & Chemical Evolution, which provided the stimulation for this work.
© 2015 The Authors.
- Black hole accretion disk
- Core-collapse supernova
- Dense neutrino medium
- Neutrino oscillations