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arXiv · 2207.03452

On kinetic theories with color and spin from amplitudes

Leonardo de la Cruz
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Abstract

We extend a previously developed approach to relate thermal currents in the high temperature regime and classical limits of amplitudes. We consider the bi-adjoint scalar theory, which has the basic structure of a cubic theory and which is related to QCD and gravity through the double copy. In addition, we consider a generalization of scalar QED to model classical spin, where massive scalars are complex higher-spin fields. We derive Vlasov-type kinetic equations for bi-adjoint scalars and study their iterative solutions, while for QED we use well-known kinetic equations. In both cases we find consistency between these solutions and the amplitude-like approach.

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Leonardo de la Cruz. 2022-11-14. On kinetic theories with color and spin from amplitudes. https://doi.org/10.1103/physrevd.106.094041

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