Radiation reaction for a massless charged particle

Details Radiation reaction for a massless charged particle Radiation reaction for a massless charged particle

2002-12-23

arxiv.org/abs/hep-th/0212286v1

Class.Quant.Grav. 20 (2003) 2715-2726

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 13 pages, no figures

Scientific paper

10.1088/0264-9381/20/13/319

We derive effective equations of motion for a massless charged particle coupled to the dynamical electromagnetic field having regard to the radiation back reaction. It is shown that unlike the massive case not all the divergences resulting from the self-action of the particle are Lagrangian, i.e. can be canceled out by adding appropriate counterterms to the original action. Besides, the order of renormalized differential equations governing the effective dynamics turns out to be greater than the order of the corresponding Lorentz-Dirac equation for a massive particle. For the case of homogeneous external field the first radiative correction to the Lorentz equation is explicitly derived via the reduction of order procedure.

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