Speaker
Giorgio Comitini
(Università degli Studi di Catania)
Description
Confinement and deconfinement of quarks and gluons can be understood in terms of the absence or presence of corresponding asymptotic states and/or quasi-particle-like excitations in the physical spectrum of QCD. In this talk, I will discuss our current knowledge of said spectrum, as encoded in the analytic structure of the QCD propagators, and I will report on recent results concerning the gluon spectrum at low and intermediate temperatures. I will then discuss the role non-perturbative contributions play in shaping the analytic structure of the QCD propagators, and possible developments in our understanding of confinement and deconfinement stemming from taking such contributions into account.