Spin--1/2 Particle in Gravitational Field of a Rotating Body

Abstract

Effective Lagrangian describing gravitational source spin-particle spin interactions is given. Cosmological and astrophysical consequences of such interaction are examined. Although stronger than expected, the spin-spin interactions do not change any cosmological effect observed so far. They are important for background primordial neutrinos.

Comments: 15 pages, Latex, 2 figures