Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8187164 | Physics Letters B | 2017 | 8 Pages |
Abstract
The first principle lattice QCD methods allow to calculate the thermodynamic observables at finite temperature and imaginary chemical potential. These can be compared to the predictions of various phenomenological models. We argue that Fourier coefficients with respect to imaginary baryochemical potential are sensitive to modeling of baryonic interactions. As a first application of this sensitivity, we consider the hadron resonance gas (HRG) model with repulsive baryonic interactions, which are modeled by means of the excluded volume correction. The Fourier coefficients of the imaginary part of the net-baryon density at imaginary baryochemical potential - corresponding to the fugacity or virial expansion at real chemical potential - are calculated within this model, and compared with the Nt=12 lattice data. The lattice QCD behavior of the first four Fourier coefficients up to Tâ185MeV is described fairly well by an interacting HRG with a single baryon-baryon eigenvolume interaction parameter bâ1fm3, while the available lattice data on the difference Ï2BâÏ4B of baryon number susceptibilities is reproduced up to Tâ175MeV.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Volodymyr Vovchenko, Attila Pásztor, Zoltán Fodor, Sandor D. Katz, Horst Stoecker,