Probing chiral restoration with ρ-meson melting through sum rules

30th Winter Workshop on Nuclear Dynamics

Hohler, Paul M.^1 ; Rapp, Ralf^1

Cyclotron Institute, Department of Physics and Astronomy, Texas A and M University, College Station

TX

77843-3366, United States^1

关键词: Chiral symmetry restoration;    Comprehensive evaluation;    Finite temperatures;    Hadron resonance gas;    Lattice calculations;    Spectral function;    Temperature dependent;    Ultrarelativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/535/1/012024/pdf
DOI  :  10.1088/1742-6596/535/1/012024

来源: IOP

【 摘 要 】

We investigate whether the rho-meson melting scenario is compatible with chiral symmetry restoration utilizing a comprehensive evaluation of the QCD and Weinberg sum rules at finite temperature. As input to this analysis, in-medium vector spectral functions which describe dilepton data from ultra-relativistic heavy-ion collisions are used along with temperature dependent condensates from lattice calculations, when available, or approximated by a hadron resonance gas. The combined deployment of QCD and Weinberg sum rules turns out to be rather stringent in constructing axialvector spectral functions consistent with (partial) chiral restoration.