Lee-Yang zeros and edge singularity in a mean-field approach
High Energy Physics - Phenomenology
2026-05-20 v1
Abstract
The analytic structure of the partition function in finite-volume systems is investigated at complex chemical potentials in a minimal mean-field effective model of QCD with finite-size effects incorporated. We discuss the temperature dependence of the Lee-Yang zeros and their relation to the edge singularity for various system sizes. Different methods for locating the critical point based on finite-size scaling of Lee-Yang zeros and susceptibility ratios are compared. We demonstrate that these methods can successfully identify the critical point, whereas a careful treatment of corrections from irrelevant operators is crucial for its accurate determination.
Cite
@article{arxiv.2605.19964,
title = {Lee-Yang zeros and edge singularity in a mean-field approach},
author = {Tatsuya Wada and Győző Kovács and Masakiyo Kitazawa and Takahiro M. Doi},
journal= {arXiv preprint arXiv:2605.19964},
year = {2026}
}
Comments
14 pages, 9 figures