Forward scattering in a thermal Plasma

Understand

I examine the regime of forward scattering of an energetic particle in a Plasma medium in thermal equilibrium.

• Treating the particle as an open quantum system interacting with a bath, I look at the time evolution of the reduced density matrix of the system.
• The kinematic and dynamical time scales that emerge can exist in several possible hierarchies which can lead to different EFT formulations.
• I show that in certain hierarchies, it becomes necessary to account for arbitrary number of coherent exchanges between the system and the bath going beyond the independent scattering paradigm.