paper

Non-geodesic motion in gravity with non-minimal coupling

arXiv:0911.2754 · doi:10.1016/j.physletb.2009.10.089

Abstract

The dynamics of test particles in modified Gauss-Bonnet gravity is investigated. It is shown that in gravity models with non-minimal coupling to matter, particles experience an extra force normal to their four-velocities and as a result move along non- geodesic world-lines. The explicit form of the extra force depends on the function of the Gauss-Bonnet term included in coupling term. The effects of this force on the relative accelerations of particles are studied.

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