Equilibrium and Non-Equilibrium Hard Thermal Loop Resummation in the Real Time Formalism

Details Equilibrium and Non-Equilibrium Hard Thermal Loop Resummation in the Real Time Formalism Equilibrium and Non-Equilibrium Hard Thermal Loop Resummation in the Real Time Formalism

1997-08-15

arxiv.org/abs/hep-ph/9708363v2

Eur.Phys.J.C7:347-354,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, REVTEX, 5 PostScript figures, revised version to be published in Eur. Phys. J. C

Scientific paper

10.1007/s100520050412

We investigate the use of the hard thermal loop (HTL) resummation technique in non-equilibrium field theory. We use the Keldysh representation of the real time formalism (RTF). We derive the HTL photon self energy and the resummed photon propagator. We show that no pinch singularities appear in the non-equilibrium HTL effective propagator. We discuss a possible regularization mechanism for these singularities at higher orders. As an example of the application of the HTL resummation method within the RTF we discuss the damping rate of a hard electron.

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