Temperature fluctuations in a realistic Polyakov-loop extended Nambu--Jona-Lasinio Model along the freeze-out line
By reparameterizing the Polyakov-loop extended Nambu--Jona-Lasinio model to align with lattice data and the BES-II energy range, this study demonstrates that a distinct dip in the second-order temperature cumulant along the freeze-out line near 7.7 GeV supports the hypothesis that the non-monotonic transverse momentum correlations observed by the STAR Collaboration are linked to the QCD critical endpoint.