报告人：华中师范大学 丁亨通 教授

报告题目：Experimentally yet unobserved hadrons from QCD thermodynamics

时间：2015年12月22日星期二下午3点

地点：物理馆323室

报告摘要：We compare lattice QCD results for appropriate combinations of net strangeness/charmness fluctuations and their correlations with net baryon number fluctuations with predictions from two hadron resonance gas (HRG) models having different strange/charmed hadron content.  The conventionally used HRG model based on experimentally established strange/charmed hadrons fails to describe the lattice QCD results in the hadronic phase close to the QCD crossover.  Supplementing the conventional HRG with additional, experimentally yet unobserved hadrons predicted by quark model calculations and observed in lattice QCD spectrum calculations leads to good descriptions of strange/charmed hadron thermodynamics below the QCD crossover.  We also discuss the influence of these experimentally yet unobserved states on the determination of freeze-out temperature and chemical potentials from heavy ion collision experiments.