Hard-thermal-loop QED thermodynamics
Nov, 2009
3 pages
Part of Proceedings, 5th International Conference on Quarks and Nuclear Physics (QNP09) : Beijing, China, September 21-26, 2009, 1527-1529
Published in:
- Chin.Phys.C 34 (2010) 9, 1527-1529
Contribution to:
- , 1527-1529
- QNP2009
- Published: Sep 23, 2010
e-Print:
- 0911.4601 [hep-ph]
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Abstract: (arXiv)
The weak-coupling expansion for thermodynamic quantities in thermal field theories is poorly convergent unless the coupling constant is tiny. We discuss the calculation of the free energy for a hot gas of electrons and photons to three-loop order using hard-thermal-loop perturbation theory (HTLpt). We show that the hard-thermal-loop perturbation reorganization improves the convergence of the successive approximations to the QED free energy at large coupling, e ~ 2. The reorganization is gauge invariant by construction, and due to the cancellations among various contributions, we obtain a completely analytic result for the resummed thermodynamic potential at three loops.- 04.25.Nx
- 11.10.Wx
- 11.15.Bt
- 12.38.Mh
- Resummation
- Hard-Thermal-Loop
- Thermal Field Theory
- QED
- Free Energy
- potential: thermodynamical
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