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Equation of state of a hot-and-dense quark gluon plasma: lattice simulations at real μ_B vs. extrapolations

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arxiv 2208.05398 v2 pith:2HMS5Z25 submitted 2022-08-10 hep-lat hep-phnucl-th

Equation of state of a hot-and-dense quark gluon plasma: lattice simulations at real μ_B vs. extrapolations

Szabolcs Borsanyi , Zoltan Fodor , Matteo Giordano , Jana N. Guenther , Sandor D. Katz , Attila Pasztor , Chik Him Wong This is my paper
classification hep-lat hep-phnucl-th
keywords equationgluonplasmaquarkschemesstateadditionapproximation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The equation of state of the quark gluon plasma is a key ingredient of heavy ion phenomenology. In addition to the traditional Taylor method, several novel approximation schemes have been proposed with the aim of calculating it at finite baryon density. In order to gain a pragmatic understanding of the limits of these schemes, we compare them to direct results at $\mu_B>0$, using reweighting techniques free from an overlap problem. We use 2stout improved staggered fermions with 8 time-slices and cover the entire RHIC BES range in the baryochemical potential, up to $\mu_B/T=3$.

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  1. Finite-density equation of state of hot QCD using the complex Langevin equation

    hep-lat 2026-04 unverdicted novelty 6.0

    Continuum-extrapolated lattice QCD simulations with complex Langevin produce the equation of state at high baryon chemical potentials above the crossover temperature at the physical point.