Free Energy of a Hot Gluon Plasma and Hard-thermal-loop Resummation
نویسنده
چکیده
Relativistic heavy-ion collisions will soon allow the experimental study of hadronic matter at energy densities that will probably exceed that required to create a quark-gluon plasma. A quantitative understanding of the properties of a quark-gluon plasma is essential in order to determine whether it has been created. Because QCD is asymptotically free, the running coupling constant αs becomes small at sufficiently high temperatures. It therefore seems plausible that one can understand the quark-gluon plasma using perturbative methods. The free energy of QCD has been calculated to fifth order in the weak-coupling expansion [2–4]. For a pure-glue plasma the result is
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