Cold Quark Matter: Renormalization Group Improvement at next-to-next-to leading order - Laboratoire Charles Coulomb (L2C)
Preprints, Working Papers, ... Year : 2024

Cold Quark Matter: Renormalization Group Improvement at next-to-next-to leading order

Abstract

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.
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hal-04693176 , version 1 (18-11-2024)

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Loïc Fernandez, Jean-Loïc Kneur. Cold Quark Matter: Renormalization Group Improvement at next-to-next-to leading order. 2024. ⟨hal-04693176⟩
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