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  • Letter
  • Open Access

Lattice simulations of the QCD chiral transition at real baryon density

Szabolcs Borsányi1, Zoltán Fodor1,2,3,4,5, Matteo Giordano4, Sándor D. Katz4,6, Dániel Nógrádi4, Attila Pásztor4,*, and Chik Him Wong1

  • 1Department of Physics, Wuppertal University, Gaussstr. 20, D-42119 Wuppertal, Germany
  • 2Pennsylvania State University, Department of Physics, State College, Pennsylvania 16801, USA
  • 3Jülich 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, UCSD, 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 105, L051506 – Published 22 March, 2022

DOI: https://doi.org/10.1103/PhysRevD.105.L051506

Abstract

We use the sign-reweighting method to simulate the QCD chiral transition at real baryon densities on phenomenologically relevant lattices. This avoids the severe limitations of extrapolating from zero or imaginary chemical potential and the overlap problem of traditional reweighting approaches, opening up a new window to reliably study hot and dense strongly interacting matter from first principle lattice simulations. We demonstrate that sign reweighting can reach up to a baryochemical potential-temperature ratio of μB/T=2.7, covering most of the Relativistic Heavy Ion Collider Beam Energy Scan range.

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Phys. Rev. D 105, L051506– Published 22 March, 2022
  • Received 14 September 2021
  • Accepted 4 February 2022
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