MG12 - Talk detail
 

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Abstract

Effective potential approach to the motion of massive test particles in Kaluza-Klein gravity

Effective potential for a class of static solutions of Kaluza-Klein equations with three-dimensional spherical symmetry is studied. Test particles motion is analyzed.In attempts to read the obtained results with the experimental data, particular attention is devoted to the Schwarzschild's limit of the four--dimensional counterpart of these (free-electromagnetic) solutions. Massive particles stable circular orbits in particular are studied, and a comparison between the well--known results if the Schwarzschild's case and ones found for the static higher-dimensional case is performed. A modification of the circular stable orbits is investigated in agreement with the experimental constraints.

Test particle motion in Reissner-Nordstrom spacetime.

Test particle motion in Reissner-Nordstrom spacetime is discussed. In particular stable circular orbits of neutral and charged test particles are analyzed and the effective potential for these cases is studied. A comparison between the black hole and naked singularity cases is performed. In particular the physic of naked singularities and the role of the classical electron radius is investigated. Analytical and numerical analysis for fixed values of the charge-mass ratio of the test particle and the Reissner-Nordstrom spacetime are given.

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