Hard-thermal-loop Resummation of the Free Energy of a Hot Quark-Gluon Plasma
نویسندگان
چکیده
The quark contribution to the free energy of a hot quark-gluon plasma is calculated to leading order in hard-thermal-loop (HTL) perturbation theory. This method selectively resums higher order corrections associated with plasma effects, such as screening, quasiparticles, and Landau damping. Comparing to the weak-coupling expansion of QCD, the error in the one-loop HTL free energy is of order αs, but the large α 3/2 s correction from QCD plasma effects is included exactly.
منابع مشابه
Free Energy of a Hot Gluon Plasma and Hard-thermal-loop Resummation
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 s...
متن کاملHard-thermal-loop Resummation of the Free Energy of a Hot Gluon Plasma
We calculate the free energy of a hot gluon plasma to leading order in hardthermal-loop-improved perturbation theory. Effects associated with screening, gluonic quasiparticles, and Landau damping are resummed to all orders. The ultraviolet divergences generated by the hard-thermal-loop propagator corrections can be cancelled by temperature-independent counterterms. The deviation of the hard-the...
متن کاملEnergy and pressure densities of a hot quark-gluon plasma.
We calculate the energy and hydrostatic pressure densities of a hot quark-gluon plasma in thermal equilibrium through diagrammatic analyses of the statistical average, h i, of the energy-momentum-tensor operator . To leading order at high temperature, the energy density of the long wave length modes is consistently extracted by applying the hard-thermal-loop resummation scheme to the operatorin...
متن کاملApproximately self-consistent resummations for the thermodynamics of the quark-gluon plasma: Entropy and density
We propose a gauge-invariant and manifestly UV finite resummation of the physics of hard thermal or dense loops ~HTL-HDL! in the thermodynamics of the quark-gluon plasma. The starting point is a simple, effectively one-loop expression for the entropy or the quark density which is derived from the fully self-consistent two-loop skeleton approximation to the free energy, but subject to further ap...
متن کاملApproximately self - consistent resummations for the thermodynamics of the quark - gluon plasma
We propose a gauge-invariant and manifestly UV finite resummation of the physics of hard thermal/dense loops (HTL/HDL) in the thermodynamics of the quark-gluon plasma. The starting point is a simple, effectively one-loop expression for the entropy or the quark density which is derived from the fully self-consistent two-loop skeleton approximation to the free energy, but subject to further appro...
متن کامل