Decay of high-energy astrophysical neutrinos.

@article{Beacom2003DecayOH,
  title={Decay of high-energy astrophysical neutrinos.},
  author={John F. Beacom and Nicole F. Bell and Dan Hooper and Sandip Pakvasa and Thomas J. Weiler},
  journal={Physical review letters},
  year={2003},
  volume={90 18},
  pages={
          181301
        }
}
Existing limits on the nonradiative decay of one neutrino to another plus a massless particle (e.g., a singlet Majoron) are very weak. The best limits on the lifetime to mass ratio come from solar neutrino observations and are tau/m greater, similar 10(-4) s/eV for the relevant mass eigenstate(s). For lifetimes even several orders of magnitude longer, high-energy neutrinos from distant astrophysical sources would decay. This would strongly alter the flavor ratios from the phi(nu(e)):phi(nu(mu… 
Cosmological Neutrino Mass Detection: The Best Probe of Neutrino Lifetime
Future cosmological data may be sensitive to the effects of a finite sum of neutrino masses even as small as {approx}0.06 eV, the lower limit guaranteed by neutrino oscillation experiments. We show
Unstable cosmic neutrino capture
Abstract Future direct observations of the Cosmic Neutrino Background (CνB) have the potential to explore a neutrino lifetime, especially in the region of the age of the universe, t0 = 4.35 × 1017
Prospect of determining the Dirac/Majorana state of the neutrino by a Multi-OWL experiment
We consider the non-radiative two-body decay of a neutrino to a daughter neutrino with degraded energy and a very light particle (Majoron). Ultrahigh-energy neutrinos from an astrophysical source
Ultra-High Energy Neutrino Fluxes and Physics Beyond the Standard Model
We study spectral distortions of diuse ultra-high energy (UHE) neutrino avour uxes resulting due to physics beyond the Standard Model (SM). Even large spectral dierences between avours at the source
Pushing the Energy and Cosmic Frontiers with High-Energy Astrophysical Neutrinos1
The astrophysical neutrinos recently discovered by the IceCube neutrino telescope have the highest detected neutrino energies --- from TeV to PeV --- and travel the longest distances --- up to a few
Pseudo-dirac neutrinos: a challenge for neutrino telescopes.
TLDR
By measuring flavor ratios as a function of L/E, mass-squared differences down to deltam( 2) approximately 10(-18) eV(2) can be reached and the possibility of probing cosmological parameters with neutrinos is commented on.
...
...