Centre-of-mass and internal symmetries in classical relativistic systems

Details Centre-of-mass and internal symmetries in classical relativistic systems Centre-of-mass and internal symmetries in classical relativistic systems

2010-05-11

arxiv.org/abs/1005.1818v2

Physics

Mathematical Physics

Scientific paper

The internal symmetry of composite relativistic systems is discussed. It is demonstrated that Lorentz-Poincar\'e symmetry implies the existence of internal moments associated with the Lorentz boost, which are Laplace-Runge-Lenz (LRL) vectors. The LRL symmetry is thus found to be the internal symmetry universally associated with the global Lorentz transformations, in much the same way as internal spatial rotations are associated with global spatial rotations. Two applications are included, for an interacting 2-body system and for an interaction-free many-body system of particles. The issue of localizability of the relativistic CM coordinate is also discussed.

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