May 17, 2024 | D. A. Clarke, P. Dimopoulos, F. Di Renzo, J. Goswami, C. Schmidt, S. Singh, and K. Zambello
The authors use the multi-point Padé approach to locate the Lee-Yang edge singularities of the QCD pressure in the complex baryon chemical potential plane. These singularities are extracted from lattice QCD simulations at physical quark mass and purely imaginary chemical potential. By applying a scaling ansatz near the conjectured QCD critical endpoint (CEP), they extrapolate the singularities to real baryon chemical potential, estimating the position of the CEP as \( T^{\text{CEP}} = 105_{-18}^{+8} \) MeV and \( \mu_B^{\text{CEP}} = 422_{-35}^{+80} \) MeV. The slope of the transition line at the CEP is found to be \( -0.16(24) \). The results are consistent with recent estimates and other theoretical predictions, providing a new strategy for locating the CEP in lattice QCD calculations.The authors use the multi-point Padé approach to locate the Lee-Yang edge singularities of the QCD pressure in the complex baryon chemical potential plane. These singularities are extracted from lattice QCD simulations at physical quark mass and purely imaginary chemical potential. By applying a scaling ansatz near the conjectured QCD critical endpoint (CEP), they extrapolate the singularities to real baryon chemical potential, estimating the position of the CEP as \( T^{\text{CEP}} = 105_{-18}^{+8} \) MeV and \( \mu_B^{\text{CEP}} = 422_{-35}^{+80} \) MeV. The slope of the transition line at the CEP is found to be \( -0.16(24) \). The results are consistent with recent estimates and other theoretical predictions, providing a new strategy for locating the CEP in lattice QCD calculations.