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On the nature of "hidden symmetry" or "accidental degeneracy" in the Kepler problem

Tamar T. Khachidze, Anzor A. Khelashvili

hep-tharXiv:hep-th/0610139

Abstract

We propose a symmetry of the Dirac equation under the interchange of signs of eigenvalues of the Dirac's K operator. We show that the only potential which obeys this requirement is the Coulomb one for both vector and scalar cases.

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