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  • Letter
  • Open Access

QCD pressure: Renormalization group optimized perturbation theory confronts lattice

Jean-Loïc Kneur1, Marcus Benghi Pinto2, and Tulio E. Restrepo2

  • 1Laboratoire Charles Coulomb (L2C), Université Montpellier, CNRS, 34095 Montpellier, France
  • 2Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

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Phys. Rev. D 104, L031502 – Published 24 August, 2021

DOI: https://doi.org/10.1103/PhysRevD.104.L031502

Abstract

The quark contribution to the QCD pressure, Pq, is evaluated up to next-to-leading order (NLO) within the renormalization group optimized perturbation theory (RGOPT) resummation approach. To evaluate the complete QCD pressure we simply add the perturbative NLO contribution from massless gluons to the resummed Pq. Despite this unsophisticated approximation our results for P=Pq+Pg at the central scale M∼2πT show a remarkable agreement with lattice predictions for 0.25≲T≲1  GeV. We also show that by being imbued with RG properties, the RGOPT produces a drastic reduction of the embarrassing remnant scale dependence that plagues both standard thermal perturbative QCD and hard thermal loop perturbation theory applications.

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Renormalization group improved pressure for hot and dense quark matter

Jean-Loïc Kneur, Marcus Benghi Pinto, and Tulio E. Restrepo
Phys. Rev. D 104, 034003 (2021)

Article Text

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Phys. Rev. D 104, L031502– Published 24 August, 2021
  • Received 20 January 2021
  • Accepted 6 July 2021
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