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

J. -P. Blaizot·E. Iancu·A. Rebhan
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Abstract

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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J. -P. Blaizot, E. Iancu, A. Rebhan. 2002-09-05. Comparing different hard-thermal-loop approaches to quark number susceptibilities. https://doi.org/10.1140/epjc%2Fs2002-01103-5

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