Soft Collective Excitations in Hot Gauge Theories
THE PREVIOUS LATEX STRUCTURE WAS MODIFIED IN ORDER TO ALLOW FOR A DIRECT IMPRESSION OF THE PAPER, WITHOUT SUPPLEMENTARY SPLITTING. THERE IS NO TEXT MODIFICATION.
hep-ph↗
arXiv subjects
Publications and source records attributed to Edmond IANCU.
THE PREVIOUS LATEX STRUCTURE WAS MODIFIED IN ORDER TO ALLOW FOR A DIRECT IMPRESSION OF THE PAPER, WITHOUT SUPPLEMENTARY SPLITTING. THERE IS NO TEXT MODIFICATION.
We show that longwavelength excitations of the quark-gluon plasma are described by simple kinetic equations which represent the exact equations of motion at leading order in $g$. Properties of the so-called ``hard thermal loops'', i.e. the dominant contributions to amplitudes with soft external lines, find in this approach a natural explanation. In particular, their generating functional appears here as the effective action describing long wavelength excitations of the plasma.