Limiting velocities as running parameters and superluminal neutrinos
  In the context of theories where particles can have different limiting velocities, we review the running of particle speeds towards a common limiting velocity at low energy. Motivated by the recent OPERA experimental results, we describe a model where the neutrinos would deviate from the common velocity by more than do other particles in the theory, because their running is slower due to weaker interactions. 
Mohamed M. Anber, John F. Donoghue
hep-ph