Foldy--Wouthuysen Transformation of the Generalized Dirac Equation in Symmetric Teleparallel Gravity
The study investigates how a generalized Dirac equation behaves in weak, static teleparallel gravity using Foldy-Wouthuysen transformations up to order 1/m². It reveals new low-energy interactions involving direct spin-gravity, anisotropic spin-momentum couplings, and tidal spin-momentum effects arising from the generalized spinor connection. This provides a framework to test constraints on the theory's additional couplings.