Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-02-10
J.Phys.A40:2053-2062,2007
Physics
High Energy Physics
High Energy Physics - Theory
10 pages, latex, submitted to JPA
Scientific paper
10.1088/1751-8113/40/9/011
It is proposed a Lagrangian for the quasi-rigid extended charged particle, which consists of a bare point particle term plus the standard electromagnetic minimal coupling. The quasi-rigid motion is imposed as a constraint. The extension of the particle and the quasi-rigid motion appear inside the current density. The Lorentz contraction of the extended particle makes the interaction term dependent on the acceleration. This dependence produces the additional terms in the equations of motion that are necessary for the proper energy and momentum conservation, and that were previously identified as the inertial effects of stress. The momentum of stress is obtained as an explicit function of the electromagnetic field.
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