Infinite Sequence of Poincare Group Extensions: Structure and Dynamics

Details Infinite Sequence of Poincare Group Extensions: Structure and Dynamics Infinite Sequence of Poincare Group Extensions: Structure and Dynamics

2008-12-22

arxiv.org/abs/0812.4140v3

J.Phys.A43:015201,2010

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, v3: significant improvement in the physical interpretation; several new references added. Final version, to appear i

Scientific paper

10.1088/1751-8113/43/1/015201

We study the structure and dynamics of the infinite sequence of extensions of the Poincar{\'e} algebra whose method of construction was described in a previous paper [1]. We give explicitly the Maurer-Cartan (MC) 1-forms of the extended Lie algebras up to level three. Using these forms and introducing a corresponding set of new dynamical couplings, we construct an invariant Lagrangian, which describes the dynamics of a distribution of charged particles in an external electromagnetic field. At each extension, the distribution is approximated by a set of moments about the world line of its center of mass and the field by its Taylor series expansion about the same line. The equations of motion after the second extensions contain back-reaction terms of the moments on the world line.

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