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  • Letter
  • Open Access

Equation of state of a hot-and-dense quark gluon plasma: Lattice simulations at real μB vs extrapolations

Szabolcs Borsányi1, Zoltán Fodor1,2,3,4,5, Matteo Giordano4, Jana N. Guenther1, Sándor D. Katz4,6, Attila Pásztor4,*, and Chik Him Wong1

  • 1Department of Physics, Wuppertal University, Gaussstrasse 20, D-42119 Wuppertal, Germany
  • 2Department of Physics, Pennsylvania State University, State College, Pennsylvania 16801, USA
  • 3Jülih Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany
  • 4ELTE Eötvös Loránd University, Institute for Theoretical Physics, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
  • 5Physics Department, USDA, San Diego, California 92093, USA
  • 6MTA-ELTE Theoretical Physics Research Group, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary

  • *Corresponding author. apasztor@bodri.elte.hu
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Phys. Rev. D 107, L091503 – Published 15 May, 2023

DOI: https://doi.org/10.1103/PhysRevD.107.L091503

Abstract

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 μB>0, using reweighting techniques free from an overlap problem. We use 2stout improved staggered fermions with eight time slices and cover the entire Relativistic Heavy Ion Collider Beam Energy Scan range in the baryochemical potential, up to μB/T=3.

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Phys. Rev. D 107, L091503– Published 15 May, 2023
  • Received 19 September 2022
  • Accepted 14 March 2023
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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