Collective neutrino oscillations and detectabilities in failed supernovae. (arXiv:1811.03320v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Zaizen_M/0/1/0/all/0/1">Masamichi Zaizen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yoshida_T/0/1/0/all/0/1">Takashi Yoshida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sumiyoshi_K/0/1/0/all/0/1">Kohsuke Sumiyoshi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Umeda_H/0/1/0/all/0/1">Hideyuki Umeda</a>
We investigate the collective neutrino oscillations under the three flavor
multi-angle approximation in a spherically symmetric simulation of failed
supernovae. A failed supernova emits high neutrino fluxes in a short time,
while intense accretion proceeds with high electron density enough to
experience re-collapse into a black hole. Our results show that matter-induced
effects completely dominate over neutrino self-interaction effects and
multi-angle matter suppression occurs at all time snapshots we studied. These
facts suggest us that only MSW resonances affect the neutrino flavor
conversions in failed supernovae and simple spectra will be observed at
neutrino detectors. We also estimate the neutrino event rate in current and
future neutrino detectors from a source at 10 kpc as a Galactic event. The time
evolution of neutrino detection could provide information about the dense and
hot matter and constrain the neutrino mass ordering problem.
We investigate the collective neutrino oscillations under the three flavor
multi-angle approximation in a spherically symmetric simulation of failed
supernovae. A failed supernova emits high neutrino fluxes in a short time,
while intense accretion proceeds with high electron density enough to
experience re-collapse into a black hole. Our results show that matter-induced
effects completely dominate over neutrino self-interaction effects and
multi-angle matter suppression occurs at all time snapshots we studied. These
facts suggest us that only MSW resonances affect the neutrino flavor
conversions in failed supernovae and simple spectra will be observed at
neutrino detectors. We also estimate the neutrino event rate in current and
future neutrino detectors from a source at 10 kpc as a Galactic event. The time
evolution of neutrino detection could provide information about the dense and
hot matter and constrain the neutrino mass ordering problem.
http://arxiv.org/icons/sfx.gif
