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Baryon number fluctuations in the QCD phase diagram from Dyson-Schwinger equations

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arxiv 1906.11644 v3 pith:5FTCM4SE submitted 2019-06-27 hep-ph hep-exhep-lat

Philipp Isserstedt , Michael Buballa , Christian S. Fischer , Pascal J. Gunkel This is my paper
classification hep-phhep-exhep-lat
keywords baryonchemicalfluctuationspotentialcriticaldiscussdyson-schwingerendpoint
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present results for fluctuations of the baryon number for QCD at nonzero temperature and chemical potential. These are extracted from solutions to a coupled set of truncated Dyson-Schwinger equations for the quark and gluon propagators of Landau-gauge QCD with $N_f = 2 + 1$ quark flavors, that has been studied previously. We discuss the changes of fluctuations and ratios thereof up to fourth order for several temperatures and baryon chemical potential up to and beyond the critical endpoint. In the context of preliminary STAR data for the skewness and kurtosis ratios, the results are compatible with the scenario of a critical endpoint at large chemical potential and slightly offset from the freeze-out line. We also discuss the caveats involved in this comparison.

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Cited by 3 Pith papers

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

  1. High-precision baryon number cumulants from lattice QCD in a finite box: cumulant ratios, Lee-Yang zeros and critical endpoint predictions

    hep-lat 2025-07 conditional novelty 6.0 of 10

    High-statistics lattice QCD data up to tenth order, analyzed with a Roberge-Weiss-symmetric rational ansatz, place an 84% upper bound of 103 MeV on the QCD critical endpoint temperature.

  2. Lattice QCD constraints on the critical point from an improved precision equation of state

    hep-lat 2025-02 conditional novelty 6.0 of 10

    An improved lattice QCD equation of state, combined with entropy contours continued from imaginary chemical potential, excludes a QCD critical point below μB = 450 MeV at 2σ confidence.

  3. Quark mass dependence of a QCD critical point and structure of the Columbia plot

    hep-ph 2025-07 conditional novelty 5.0 of 10

    In a truncated Dyson-Schwinger setup, the QCD critical point moves to higher temperature and lower baryon chemical potential as light quark masses decrease toward the chiral limit.

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