New 4D lattice QCD equation of state: Extended density coverage from a generalized T ′ expansion

Year: 2025

Type: article

Abstract: We present a new equation of state for QCD in which the temperature T and the three chemical potentials for baryon number μ B , electric charge μ Q , and strangeness μ S can be varied independently. This result is based on a generalization of the T ′ expansion scheme, thanks to which the diagonal μ B extrapolation was pushed up to a baryo-chemical potential μ B / T ∼ 3.5 for the first time. This considerably extended the coverage of the Taylor expansion, limited to μ 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 findings are based on new continuum estimated lattice data on the full set of second- and fourth-order fluctuations.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/2dmh-26yh

Authors: Ahmed Abuali, Szabolcs Borsányi, Zoltán Fodor, Johannes Jahan, Micheal Kahangirwe, Paolo Parotto, Attila Pásztor, Claudia Ratti, Hitansh Shah, Seth A. Trabulsi

Institutions: University of Houston, University of Wuppertal, Eötvös Loránd University, Pennsylvania State University, Forschungszentrum Jülich, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Rice University

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Nuclear Safety and Security Commission, Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen, Gauss Centre for Supercomputing, Office of Science, National Research, Development and Innovation Office, Nuclear Physics, Argonne National Laboratory

OpenAlex ID: W4414080893