1998/12/22 by E. V. Shuryak, Edward Shuryak, Shuryak, E. V.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9812482
Lecture at the Ettore Majorana school ``From the Plank Length to Hubble Radius", Erice, Sept. 98
arxiv created 1998/12/22 · openalex publication_date 1998/12/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the lecture we review several issues related to recent development in non-perturbative QCD. The ``instanton liquid model'' reproduces not only the basic vacuum parameters (the condensates), but even hadronic correlators. New information obtained from lattice simulations also confirm it. Meanwhile the model itself was developed into a self-consistent approach, allowing to include 't Hooft interaction to all orders. It was also generalized to non-zero temperatures and high densities. We discuss one issue, displayed by behavior of the pion and rho correlation functions: the former has strong non-perturbative effects at small distances, the latter has none. What happens at T∼ Tc can be answered by dilepton production experiments with heavy ion collisions. The results definitely indicate large changes in spectral density and "melting" of the rho meson peak, possibly reaching the rate corresponding to complete chiral restoration.