User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse




Journal Article

Collective neutrino flavor conversion: Recent developments


Hansen,  Rasmus
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)

(Preprint), 345KB

Supplementary Material (public)
There is no public supplementary material available

Chakraborty, S., Hansen, R., Izaguirre, I., & Raffelt, G. (2016). Collective neutrino flavor conversion: Recent developments. Nuclear Physics B, 908, 366-381. doi:10.1016/j.nuclphysb.2016.02.012.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-9D18-9
Neutrino flavor evolution in core-collapse supernovae, neutron-star mergers, or the early universe is dominated by neutrino-neutrino refraction, often spawning "self-induced flavor conversion", i.e., shuffling of flavor among momentum modes. This effect is driven by collective run-away modes of the coupled "flavor oscillators" and can spontaneously break the initial symmetries such as axial symmetry, homogeneity, isotropy, and even stationarity. Moreover, the growth rates of unstable modes can be of the order of the neutrino-neutrino interaction energy instead of the much smaller vacuum oscillation frequency: self-induced flavor conversion does not always require neutrino masses. We illustrate these newly found phenomena in terms of simple toy models. What happens in realistic astrophysical settings is up to speculation at present.