Superluminal neutrinos from Lorentz-violating dimension-5 operators
  We consider Lorentz- and CPT-violating dimension-5 operators to address the issue of superluminal neutrinos recently pointed out in OPERA experiments. We assume these operators in the photon and neutrino sectors coupled to Lorentz-violating backgrounds in a preferred frame defined by a time-like direction. We show that such operators can produce a curve with OPERA's slope that fits OPERA, MINOS and supernova SN1987a data. 
C. A. G. Almeida, M. A. Anacleto, F. A. Brito, E. Passos
hep-ph