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

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arxiv 2504.01881 v1 pith:TYH6WGSL submitted 2025-04-02 hep-lat hep-ph

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

classification hep-lat hep-ph
keywords expansioncoverageresultsequationextendedlatticestatetaylor
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a new equation of state for QCD in which the temperature $T$ and the three chemical potentials for baryon number $\mu_B$, electric charge $\mu_Q$ and strangeness $\mu_S$ can be varied independently. This result is based on a generalization of the $T'$-expansion scheme, thanks to which the diagonal $\mu_B$ extrapolation was pushed up to a baryo-chemical potential $\mu_B/T \sim 3.5$ for the first time. This considerably extended the coverage of the Taylor expansion, limited to $\mu_B/T < 2.5-3$. 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.

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Cited by 6 Pith papers

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

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  2. Four-dimensional QCD equation of state from a quasi-parton model with physics-informed neural networks

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  4. Partial Pressure Contributions of Hadron Families to the QCD Equation of State

    hep-ph 2026-06 unverdicted novelty 5.0

    Linear combinations of susceptibilities isolate partial pressures of hadron families classified by B, Q, and S in the low-T QCD regime under the HRG assumption, validated against lattice data.

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