Neutrino oscillation caused by spacetime geometry

TL;DR

This paper explores how spacetime geometry and gravitational effects influence neutrino oscillations by deriving an effective mass modification through a first order gravity formulation coupled with fermions.

Contribution

It introduces a first order gravity approach to include gravitational effects in neutrino physics, revealing how spacetime torsion impacts neutrino oscillation parameters.

Findings

Gravitational interactions induce an effective neutrino mass.

Contortion from spacetime geometry affects neutrino oscillation parameters.

Gravity can alter neutrino oscillation behavior in thermal backgrounds.

Abstract

Effects of gravitational interaction are generally neglected in particle physics. A first order formulation of gravity is presented to include gravity in Quantum Mechanical Lagrangian of fermions. It is seen that fermions minimally coupled to gravity gives 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.