Spin flip of neutrinos with magnetic moment in core-collapse supernova

Details Spin flip of neutrinos with magnetic moment in core-collapse supernova Spin flip of neutrinos with magnetic moment in core-collapse supernova

2009-05-22

arxiv.org/abs/0905.3658v3

Phys.Atom.Nucl.73:614-624,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Submitted to a special issue of Yadernaya Fizika (Physics of Atomic Nuclei) dedicated to 80th birthday of L.B. Okun

Scientific paper

Neutrino with magnetic moment can experience a chirality flip while scattering off charged particles. This effect may lead to important consequences for the dynamics and the neutrino signal of the core-collapse supernova. It is known that if neutrino is a Dirac fermion, then nu_L->nu_R transition induced by the chirality flip leads to the emission of sterile right-handed neutrinos. The typical energies of these neutrinos are rather high, E ~ (100-200)MeV. Neutrino spin precession in the magnetic field either inside the collapsing star or in the interstellar space may lead to the backward transition, nu_R->nu_L. Both possibilities are known to be interesting. In the former case high-energy neutrinos can deliver additional energy to the supernova envelope, which can help the supernova to explode. In the latter case high-energy neutrinos may be detected simultaneously with the "normal" supernova neutrino signal, which would be a smoking gun for the Dirac neutrino magnetic moment. We report the results of the calculation of the supernova right-handed neutrino luminosity up to 250 ms after bounce. They allow to refine the estimates of the energy emitted in right-handed neutrinos. Also the sensitivity of water Cherenkov detectors to the Dirac neutrino magnetic moment is estimated. For mu_Dirac=10^{-13}mu_B Super-Kamiokande is expected to detect at least few high-energy events from a galactic supernova explosion. Also we briefly discuss the case of Majorana neutrino magnetic moment. It is pointed out that spin flips may quickly equilibrate electron neutrinos with non-electron antineutrinos if mu_Majorana~10^{-12}mu_B. This may lead to various consequences for supernova physics.

Affiliated with

Also associated with

No associations

Rating

Spin flip of neutrinos with magnetic moment in core-collapse supernova does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spin flip of neutrinos with magnetic moment in core-collapse supernova, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin flip of neutrinos with magnetic moment in core-collapse supernova will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-325451