Department of Physics2024-11-0920030218-271810.1142/S02182718030024452-s2.0-0037278997https://hdl.handle.net/20.500.14288/4023Dirac equation is written in a non-Riemannian spacetime with torsion and non-metricity by lifting the connection from the tangent bundle to the spinor bundle over spacetime. Foldy-Wouthuysen transformation of the Dirac equation in a Schwarzschild background spacetime. is considered. and it is shown that both the torsion and non-metricity couples to the momentum and spin of a massive, spinning particle. However, the effects are small to be observationally significant.pdfAstronomy and astrophysicsJournal Article1793-6594https://doi.org/10.1142/S0218271803002445180722800010N/ANOIR01045