A new 4D lattice QCD equation of state: extended density coverage from a generalized T^′-expansion

2025/04/02 by Ahmed Abuali, Abuali, Ahmed, Szabolcs Borsányi +17 · 1 voice · 6 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #hep-lat #hep-ph

paper · pdf · doi:10.48550/arxiv.2504.01881

Abstract

We present a new equation of state for QCD in which the temperature T and the three chemical potentials for baryon number μ_B, electric charge μ_Q and strangeness μ_S can be varied independently. This result is based on a generalization of the T'-expansion scheme, thanks to which the diagonal μ_B extrapolation was pushed up to a baryo-chemical potential μ_B/T ∼ 3.5 for the first time. This considerably extended the coverage of the Taylor expansion, limited to μ_B/T < 2.5-3. As a consequence, we are able to offer a substantially larger coverage of the four-dimensional QCD phase diagram as well, compared to previously available Taylor expansion results. Our results are based on new continuum estimated lattice results on the full set of second and fourth order fluctuations.

Cited by

• The QCD phase diagram
• Exploring the QCD phase diagram through correlations and fluctuations
• Upper Bound on the Cosmic Baryon Chemical Potential from Lepton-Flavor Asymmetry
• Finite density QCD phase structure from strangeness fluctuations
• Transport-based initial conditions for heavy-ion collisions at finite densities
• A Resummed Hydrodynamic Description of Relativistic Heavy-ion Collisions

Discussions

• New paper day! 4D equation of state for strongly interacting matter with extended coverage from first principles! www.arxiv.org/abs/2504.01881 [bsky, 3 points, 0 comments]

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