title: Generalized Lorentz-Dirac equation for a strongly coupled gauge theory.
abstract: We derive a semiclassical equation of motion for a "composite" quark in strongly coupled large-N_{c} N = 4 super Yang-Mills theory, making use of the anti-de Sitter space/conformal field theory correspondence. The resulting nonlinear equation incorporates radiation damping, and reduces to the standard Lorentz-Dirac equation for external forces that are small on the scale of the quark Compton wavelength, but has no self-accelerating or preaccelerating solutions. From this equation one can read off a nonstandard dispersion relation for the quark, as well as a Lorentz-covariant formula for its radiation rate.
authors: Departamento de Física de Altas Energías, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México Distrito Federal 04510, Mexico.
authors: Mariano
authors: M
authors: Chernicoff
authors: J Antonio
authors: JA
authors: García
authors: Alberto
authors: A
authors: Güijosa