Test particle description of transport processes for states with a continuous mass spectrum

Details Test particle description of transport processes for states with a continuous mass spectrum Test particle description of transport processes for states with a continuous mass spectrum

1999-11-23

arxiv.org/abs/hep-ph/9911453v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, no figures, Talk given at the workshop ``Kadanoff-Baym Equations --- Progress and Perspectives for Many-Body

Scientific paper

Aiming at a description of transport processes where the dynamically generated width of the states is potentially large a transport equation beyond the quasiparticle approximation is derived in first order gradient expansion. An effective particle number is identified which is exactly conserved by the coarse grained transport equation. Using a test particle ansatz for this conserved quantity allows to rewrite the transport equation into equations of motion for test particles. The two-body collision terms are formulated in terms of the test particles which gain non-trivial renormalization factors due to the coarse graining process.

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