Equations of Motion of Spinning Relativistic Particle in Electromagnetic and Gravitational Fields

Details Equations of Motion of Spinning Relativistic Particle in Electromagnetic and Gravitational Fields Equations of Motion of Spinning Relativistic Particle in Electromagnetic and Gravitational Fields

1998-09-24

arxiv.org/abs/gr-qc/9809069v1

Surveys High Energ.Phys.14:145-173,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

32 pages, latex, Plenary talk at the Fairbank Meeting on the Lense--Thirring Effect, Rome-Pescara, 29/6-4/7 1998

Scientific paper

We consider the motion of a spinning relativistic particle in external electromagnetic and gravitational fields, to first order in the external field, but to an arbitrary order in spin. The noncovariant spin formalism is crucial for the correct description of the influence of the spin on the particle trajectory. We show that the true coordinate of a relativistic spinning particle is its naive, common coordinate $\r$. Concrete calculations are performed up to second order in spin included. A simple derivation is presented for the gravitational spin-orbit and spin-spin interactions of a relativistic particle. We discuss the gravimagnetic moment (GM), a specific spin effect in general relativity. It is shown that for the Kerr black hole the gravimagnetic ratio, i.e., the coefficient at the GM, equals unity (just as for the charged Kerr hole the gyromagnetic ratio equals two). The equations of motion obtained for relativistic spinning particle in external gravitational field differ essentially from the Papapetrou equations.

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