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arxiv: hep-ph/9702376 · v1 · submitted 1997-02-20 · ✦ hep-ph

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Screened Perturbation Theory

Frithjof Karsch , Andras Patkos , Peter Petreczky
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classification ✦ hep-ph
keywords loopscreenedexpansionfieldgeneratedperturbativetheoryaccount
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A new perturbative scheme is proposed for the evaluation of the free energy density of field theories at finite temperature. The screened loop expansion takes into account exactly the phenomenon of screening in thermal propagators. The approach is tested in the N-component scalar field theory at 2-loop level and also at 3-loop in the large N limit. The perturbative series generated by the screened loop expansion shows much better numerical convergence than previous expansions generated in powers of the quartic coupling.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Emergent chiral spin symmetry, non-perturbative dynamics and thermoparticles in hot QCD

    hep-ph 2025-12 unverdicted novelty 3.0

    Lattice data indicate hot QCD features an intermediate phase with emergent chiral spin symmetry and thermoparticles as thermal constituents, differing from perturbative expectations.