Gravitational Effects on the Neutrino Oscillation
  The propagation of neutrinos in a gravitational field is studied. A method of calculating a covariant quantum-mechanical phase in a curved space-time is presented. The result is used to calculate gravitational effects on the neutrino oscillation in the presence of a gravitational field. We restrict our discussion to the case of the Schwartzschild metric. Specifically, the cases of the radial propagation and the non-radial propagation are considered. A possible application to gravitational lensing of neutrinos is also suggested. 
N. Fornengo, C. Giunti, C.W. Kim and J. Song (The Johns Hopkins   University, USA, and INFN, Sezione di Torino, Italy)