Neutrino Oscillation Caused by Spacetime Geometry

Keywords: Neutrino oscillation, Non-standard interaction, Einstein-Cartan-Dirac-Sciama-Kibble theroy, Torsion, Chiral Torsion, First order formulation of gravity


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

Special Issue on Neutrinos and Dark Matter-2022