New Frontiers in QCD 2026

Lee-Yang zeros and edge singularity in a finite-size effective model

Oct 28, 2026, 3:55 PM

30m

Panasonic Auditorium, Yukawa Hall (YITP, Kyoto University)

(2nd week, Oct. 19-23) QCD Matter under Extreme Conditions YKIS Symposium

Speaker

Gyozo Kovacs (University of Wrocław & Wigner RCP)

Description

Finite-size effects modify the QCD phase diagram not only at real but also at complex values of the thermodynamic parameters. In this talk, we discuss these effects in an effective model framework that can describe finite-size scaling and the Lee-Yang zeros in finite volumes, while exhibiting a critical point in the thermodynamic limit. We compare several methods for locating the criticality based on the Lee-Yang zeros and susceptibility ratios at finite sizes. These methods provide a consistent estimate for the critical point, while a careful treatment of corrections from irrelevant operators is also crucial for an accurate determination of its location.