Explanation for the low flux of high energy astrophysical muon-neutrinos
  We consider the possibility that some exotic neutrino property is responsible for reducing the muon neutrino flux at high energies from distant neutrino sources; specifically, we consider (i) neutrino decay and (ii) neutrinos being pseudo-Dirac particles. This would provide a mechanism for the lack of high energy muons in the Icecube detector. 
Sandip Pakvasa, Anjan Joshipura and Subhendra Mohanty
hep-ph astro-ph.HE hep-ex