Neutrino Oscillation Caused by Spacetime Geometry

Effects of gravitational interaction are generally neglected in particle physics. A first order formulation gravity is presented to include Quantum Mechanical Lagrangian fermions. It seen that fermions minimally coupled gives rise a torsionless effective theory with quartic interaction. After passing through thermal background the most generic form contortion contributes neutrino mass. This mass can change current oscillation parameters.