%0 Unpublished work
%T Cold Quark Matter: Renormalization Group Improvement at next-to-next-to leading order
%+ Laboratoire Charles Coulomb (L2C)
%A Fernandez, Loïc
%A Kneur, Jean-Loïc
%8 2024-09-10
%D 2024
%Z 2408.16674
%K higher-order, 0
%K scale, renormalization
%K higher-order, 2
%K quark, matter
%K quark, massless
%K temperature, 0
%K quark, mass dependence
%K quantum chromodynamics, perturbation theory
%K quark, flavor
%K pressure
%K renormalization group
%K resummation
%K density
%K sensitivity
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Preprints, Working Papers, ...
%X We extend previous next-to-next-to leading order (NNLO) calculations of the QCD pressure at zero temperature and non-zero baryonic densities using the renormalization group optimized perturbation theory (RGOPT), which entails an all-order RG-invariant resummation. First, we consider the approximation of three massless quark flavors, and then adding the running strange quark mass dependence. The resulting pressure displays a sizeably reduced sensitivity to variations of the arbitrary renormalization scale as compared to the state-of-the-art NNLO results. This confirms previous NLO investigations that the RGOPT resummation scheme provides improved convergence properties and reduced renormalization scale uncertainties, thus being a promising prescription to improve perturbative QCD at high and mid range baryonic densities.
%G English
%L hal-04693176
%U https://hal.science/hal-04693176
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021