Quark number susceptibilities from HTL-resummed thermodynamics

Details Quark number susceptibilities from HTL-resummed thermodynamics Quark number susceptibilities from HTL-resummed thermodynamics

2001-10-29

arxiv.org/abs/hep-ph/0110369v3

Phys.Lett. B523 (2001) 143-150

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 figures, uses elsart.cls; v2: minor corrections; v3: sign in eq.(1) corrected

Scientific paper

10.1016/S0370-2693(01)01316-8

We compute analytically the diagonal quark number susceptibilities for a quark-gluon plasma at finite temperature and zero chemical potential, and compare with recent lattice results. The calculation uses the approximately self-consistent resummation of hard thermal and dense loops that we have developed previously. For temperatures between 1.5 to 5 $T_c$, our results follow the same trend as the lattice data, but exceed them in magnitude by about 5-10%. We also compute the lowest order contribution, of order $\alpha_s^3\log(1/\alpha_s)$, to the off-diagonal susceptibility. This contribution, which is not a part of our self-consistent calculation, is numerically small, but not small enough to be compatible with a recent lattice simulation.

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