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Test particle motion in modified gravity theories

Mahmood Roshan

  • School of Physics, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531 Tehran, Iran

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Phys. Rev. D 87, 044005 – Published 4 February, 2013

DOI: https://doi.org/10.1103/PhysRevD.87.044005

Abstract

We derive the equations of motion of an electrically neutral test particle for modified gravity theories for which the covariant divergence of the ordinary matter energy-momentum tensor does not vanish (i.e., ∇μTμν≠0). In fact, we generalize the Mathisson-Papapetrou equations by deriving a general form for the equations of motion of a test particle. Furthermore, using the generalized Mathisson-Papapetrou equations, we investigate the equations of motion of a pole-dipole (spinning) particle in the context of modified gravity.

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Phys. Rev. D 87, 044005– Published 4 February, 2013
  • Received 25 October 2012

© 2013 American Physical Society

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