Finding Dirac Spin Effect in NUT Spacetime

In the present study, we are interested in finding the spin precession of a Dirac particle in expanding and rotating NUT spacetime. A tetrad with two functions to be determined is applied to the field equation of the teleparallel theory of gravity via a coordinate transformation. The vector, the axial-vector and the tensor parts of the torsion tensor are obtained. We found that the vector parts are in the radial and φ-directions. The axial-vector torsion is along r-direction while its other components along θ and φ-directions vanish everywhere. The vector connected with Dirac spin has been evaluated as well. (general)