Does the Superluminal Neutrino Uncover Torsion?
  I investigate the possibility of the propagation of neutrino with superluminal speed through matter in the context of the relation between gravity, spin and torsion. Using a lemma of Penrose and earlier works on the relation between spin, torsion and gravity I glimpse on a frame work in which superluminal speed of the neutrinos moving through matter become possible. In presence of torsoin neutrinos are found to follow spacelike geodesics by tunneling through the light cone into the spacelike region and consequently appear to have superluminal speed in our timelike world, whereas photons always follow null geodesics. This frame work may set new frontiers for spacetime physics. 
M. B. Altaie
gr-qc