Baryon number fluctuations in the 2+1 flavor low energy effective model

TL;DR

This paper computes high-order baryon number fluctuations in a 2+1 flavor effective model using the functional renormalization group, exploring phase transitions and comparing results with lattice QCD.

Contribution

It introduces a method to calculate high-order cumulants in a low energy effective model incorporating quantum fluctuations via the functional renormalization group.

Findings

Results align with lattice QCD data

Baryon number and strangeness fluctuations up to sixth order are obtained

Phase transition behaviors are characterized at finite temperature and chemical potential

Abstract

High order cumulants of the baryon number distribution are calculated in a 2+1 flavor low energy effective model. Quantum fluctuations are encoded through the functional renormalization group approach. The chiral and deconfinement phase transitions are investigated at finite temperature and baryon chemical potential. The equation of state for the QCD matter, fluctuations of the baryon number and the strangeness up to sixth order are calculated, and one finds the results are consistent with those from lattice QCD.