Abstract
A new representation, which does not contain the third-order derivatives of the coordinates, of the exact Mathisson–Papapetrou–Dixon equations, describing the motion of a spinning test particle, is obtained under the assumption of the Mathisson–Pirani condition in a Kerr background. For this purpose the integrals of energy and angular momentum of the spinning particle as well as a differential relationship following from the Mathisson–Papapetrou–Dixon equations are used. The form of these equations is adapted for their computer integration with the aim to investigate the influence of the spin–curvature interaction on the particle's behavior in the gravitational field without restrictions on its velocity and spin orientation. Some numerical examples for a Schwarzschild background are presented.
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