Martin Formanek, University of Arizona
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Where
Abstract:
Two aspects of classical relativistic particle motion in which the covariant Lorentz force equation leaves room for improvement are presented. These are a) Stern-Gerlach force, which describes interactions of magnetic moment of particles with external electromagnetic fields, and b) radiation friction force, which accelerated charged particles experience due to their emission of radiation. Despite the upcoming centenary of the Stern-Gerlach experiment in 2022, the covariant implementation of the corresponding force is still under development. Here, a covariant model for Stern-Gerlach force relying on magnetic moment charge and magnetic 4-potential is introduced, and its application on neutral particle motion in external plane wave fields is shown. The radiation friction problem is even older, originating with Larmor in 1897, and before it is resolved, classical electromagnetism cannot be considered a complete theoretical framework. In this talk, it is explored in the context of a charged particle decelerating in a material resistive medium. The radiation friction is modeled through medium warping along the particle path. An example of quark jets slowed down in a quark-gluon plasma fireball is considered.
Zoom link: https://arizona.zoom.us/j/88657478527
Password: TDMF1117