Radiation-reaction in classical offshell electrodynamics: I. The above mass-shell case

Details Radiation-reaction in classical offshell electrodynamics: I. The above mass-shell case Radiation-reaction in classical offshell electrodynamics: I. The above mass-shell case

2011-05-27

arxiv.org/abs/1105.5498v1

J. Math. Phys. 53, 032902 (2012)

Physics

Mathematical Physics

45 pages, 18 figures

Scientific paper

10.1063/1.3694276

Offshell electrodynamics based on a manifestly covariant off-shell relativistic dynamics of Stueckelberg, Horwitz and Piron, is five-dimensional. In this paper, we study the problem of radiation reaction of a particle in motion in this framework. In particular, the case of above-mass-shell is studied in detail, where the renormalization of the Lorentz force leads to a system of non-linear differential equations for 3 Lorentz scalars. The system is then solved numerically, where it is shown that the mass-shell deviation scalar $\ve$ either smoothly falls down to 0 (this result provides a mechanism for the mass stability of the off-shell theory), or strongly diverges under more extreme conditions. In both cases, no runaway motion is observed. Stability analysis indicates that the system seems to have chaotic behavior in the divergent case. It is also shown that, although a motion under which the mass-shell deviation $\ve$ is constant but not-zero, is indeed possible, but, it is unstable, and eventually it either decays to 0 or diverges.

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