Thermalisation of Longitudinal Gluons

Details Thermalisation of Longitudinal Gluons Thermalisation of Longitudinal Gluons

1993-03-18

arxiv.org/abs/hep-ph/9303276v1

Nucl.Phys. B410 (1993) 23-36

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure appended as pictex-file, DAMTP 93-06, TUW-93-03

Scientific paper

10.1016/0550-3213(93)90571-6

In the usual real-time finite-temperature gauge theory both the physical and the unphysical degrees of freedom are thermalised. We discuss the alternative approach where only the physical transverse components of the gauge field have bare thermal propagators, whereas the unphysical degrees of freedom are not heated. We show how pinch singularities are avoided: sometimes this requires resummation. If only the hard thermal loop is included in the resummation, the spatially-longitudinal component of the gauge field, which contains an extra collective plasmon mode, becomes fully thermalised, though the Faddeev-Popov ghost and the remaining unphysical component of the gauge field remain frozen.

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