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Hot and Dense QCD Shear Viscosity at (almost) NLO

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arxiv 2408.00524 v1 pith:ND5BPLHD submitted 2024-08-01 hep-ph hep-thnucl-th

classification hep-phhep-thnucl-th
keywords shearviscositybaryonchemicalfinitenext-to-leadingorderweak-coupling
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The next-to-leading order weak-coupling shear viscosity of QCD was computed 6 years ago. However, these results have never been applied at finite baryon chemical potential $\mu$, even though intermediate-energy heavy ion collisions and merging neutron stars may explore the Quark-Gluon Plasma in a regime where baryon chemical potentials are large. Here, we extend the next-to-leading order shear viscosity calculations to finite $\mu$, and we show that, while the convergence of the weak-coupling expansion is questionable for achievable plasmas, it is somewhat better at $\mu > T$ than at $\mu=0$.

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Cited by 2 Pith papers

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

  1. Thermodynamic and transport properties of hot asymmetric nuclear matter within a chiral SU(3) model

    nucl-th 2025-12 conditional novelty 4.0 of 10

    Hot asymmetric nuclear matter has lower shear viscosity and higher thermal conductivity when nucleons are dressed by a chiral SU(3) mean field than when treated as a free gas, with isospin asymmetry mainly boosting th...

  2. What is the Quark-Gluon Plasma made of?

    nucl-th 2025-06 accept novelty 2.0 of 10

    The quark-gluon plasma is best described as a strongly coupled liquid of massive, very short-lived quark and gluon quasiparticles, with sound (phonon) modes becoming the most well-defined collective excitation at low momenta.

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