Comparing different hard-thermal-loop approaches to quark number susceptibilities

Details Comparing different hard-thermal-loop approaches to quark number susceptibilities Comparing different hard-thermal-loop approaches to quark number susceptibilities

2002-06-26

arxiv.org/abs/hep-ph/0206280v2

Eur.Phys.J.C27:433-438,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 6 figures. Revised version to appear in Eur. J. Phys. C

Scientific paper

10.1140/epjc/s2002-01103-5

We compare our previously proposed hard-thermal-loop (HTL) resummed calculation of quark number susceptibilities using a self-consistent two-loop approximation to the quark density with a recent calculation of the same quantity at the one-loop level in a variant of HTL-screened perturbation theory. Besides pointing out conceptual problems with the latter approach, we show that it severely over-includes the leading-order interaction effects while including none of the plasmon term which after all is the reason to construct improved resummation schemes.

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