Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram

Vovchenko, Volodymyr; Koch, Volker; Shen, Chun

doi:10.5506/aphyspolbsupp.16.1-a83

Title: Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram

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Abstract

We analyze the behavior of (net-)proton number cumulants in central collisions of heavy ions across a broad collision energy range by utilizing hydrodynamic simulations. The calculations incorporate essential non-critical contributions to proton fluctuations such as repulsive baryonic core and exact baryon-number conservation. The experimental data are consistent with non-critical physics at collision energies of √SNN ≥ 20 GeV. The data from the STAR and HADES collaborations at lower collision energies indicate an excess of (multi-)proton correlations over the non-critical reference. This observation is discussed in the context of different mechanisms, including the possibility of a critical point in the baryon-rich region of the QCD phase diagram.

Authors:

Vovchenko, Volodymyr ^[1]; Koch, Volker ^[2]; Shen, Chun ^[3]

University of Washington, Seattle, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Wayne State University, Detroit, MI (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Publication Date:: Sun Jan 01 00:00:00 EST 2023

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 2234025

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Acta Physica Polonica. Series B, Proceedings Supplement

Additional Journal Information:: Journal Volume: 16; Journal Issue: 1; Journal ID: ISSN 1899-2358

Publisher:: Jagiellonian University

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Vovchenko, Volodymyr, Koch, Volker, and Shen, Chun. Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram.  United States: N. p., 2023. 
Web.  doi:10.5506/aphyspolbsupp.16.1-a83.

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                    Vovchenko, Volodymyr, Koch, Volker, & Shen, Chun. Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram.  United States.  https://doi.org/10.5506/aphyspolbsupp.16.1-a83

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                    Vovchenko, Volodymyr, Koch, Volker, and Shen, Chun. Sun .  
"Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram".  United States.  https://doi.org/10.5506/aphyspolbsupp.16.1-a83.  https://www.osti.gov/servlets/purl/2234025.

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@article{osti_2234025,

  title        = {Proton Number Cumulants and Correlation Functions from Hydrodynamics and the QCD Phase Diagram},

  author       = {Vovchenko, Volodymyr and Koch, Volker and Shen, Chun},

  abstractNote = {We analyze the behavior of (net-)proton number cumulants in central collisions of heavy ions across a broad collision energy range by utilizing hydrodynamic simulations. The calculations incorporate essential non-critical contributions to proton fluctuations such as repulsive baryonic core and exact baryon-number conservation. The experimental data are consistent with non-critical physics at collision energies of √SNN ≥ 20 GeV. The data from the STAR and HADES collaborations at lower collision energies indicate an excess of (multi-)proton correlations over the non-critical reference. This observation is discussed in the context of different mechanisms, including the possibility of a critical point in the baryon-rich region of the QCD phase diagram.},

  doi          = {10.5506/aphyspolbsupp.16.1-a83},

  journal      = {Acta Physica Polonica. Series B, Proceedings Supplement},

  number       = 1,

  volume       = 16,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 2023},

  month        = {Sun Jan 01 00:00:00 EST 2023}

}

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