Temperature dependence of pion and sigma-meson screening masses is evaluated by the Polyakov-loop extended Nambu--Jona-Lasinio model with the entanglement vertex (EPNJL model). We propose a practical way of calculating meson screening masses in the NJL-type effective models. The method based on the Pauli-Villars regularization solves the well-known difficulty that the evaluation of screening masses is not easy in the NJL-type effective models. The method is applied to analyze temperature dependence of pion screening masses calculated with state-of-the-art lattice simulations with success in reproducing the lattice QCD results. We predict the temperature dependence of pole mass by using EPNJL model.
@article{arxiv.1504.07706,
title = {Temperature dependence of meson screening masses; a comparison of effective model with lattice QCD},
author = {Masahiro Ishii and Takahiro Sasaki and Kouji Kashiwa and Hiroaki Kouno and Masanobu Yahiro},
journal= {arXiv preprint arXiv:1504.07706},
year = {2015}
}
Comments
7 pages, 3 figures, Presented at The 32nd International Symposium on Lattice Field Theory, Lattice2014