Searching for the QCD critical end point using multipoint Padé approximations
Year: 2025
Type: article
Abstract: Using the multipoint Padé approach, we locate Lee-Yang edge singularities of the quantum chromodynamics (QCD) pressure in the complex baryon chemical potential plane. These singularities are extracted from singularities in the net baryon-number density calculated in N f = 2 + 1 lattice QCD at physical quark mass and purely imaginary chemical potential. Taking an appropriate scaling ansatz in the vicinity of the conjectured QCD critical end point, we extrapolate the singularities on N τ = 6 lattices to pure real baryon chemical potential to estimate the position of the critical end point (CEP). We find T CEP = 10 2 − 23 + 11 MeV and μ B CEP = 42 8 − 74 + 162 MeV , which compares well with recent estimates in the literature. For the slope of the transition line at the critical point we find − 0.16 ( 20 ) .
DOI: 10.1103/y6kg-ry8x
Authors: D. A. Clarke, P. Dimopoulos, F. Di Renzo, J. Goswami, C. Schmidt, S. Singh, K. Zambello
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, European Commission, Deutsche Forschungsgemeinschaft, Partnership for Advanced Computing in Europe AISBL, Universität Bielefeld, Ministerium für Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen, Istituto Nazionale di Fisica Nucleare, Ministero dell'Università e della Ricerca, Gauss Centre for Supercomputing, Horizon 2020 Framework Programme, Instituto Nazionale di Fisica Nucleare, H2020 Marie Skłodowska-Curie Actions
Awards: Lattice Gauge Theory at the Intensity Frontier, G166579837, G434337789, TRR 211: Stark wechselwirkende Materie unter extremen Bedingungen, G5910804684, European network for Particle physics, Lattice field theory and Extreme computing, European network for Particle physics, Lattice field theory and Extreme computing, PUNCH4NFDI Teilchen, Universum, Kerne und Hadronen für die NFDI, G8204817419, G936130108
OpenAlex ID: W4416685844