Theoretical Physics Colloquium by Prof. Chun Shen.
This presentation was held live on March 31, 2021 as part of the theoretical physics colloquium series hosted by Prof. Igor Shovkovy at the Arizona State University. The series features high-quality interactive presentations on current advances in theoretical physics by active researchers in the field of theoretical physics.
Abstract for this
High energy relativistic nuclear collisions create matter in an extremely hot and dense environment. Such matter exhibits near-perfect fluidity that emerges from many-body interactions among deconfined quarks and gluons, known as the Quark-Gluon Plasma (QGP). A wealth of high precision measurements at the Relativistic Heavy-Ion Collider (RHIC) and the Large Hadron Collider (LHC) have been driving our field to an era of multi-messenger characterization of the QGP properties. Like multi-messenger astronomy, different types of particles emitted from heavy-ion collisions carry unique dynamical information, which also complements each other. Hadrons with transverse momenta below 2 GeV interact collectively. Their momentum distributions encode QGP’s thermal and transport properties. QCD jets and heavy-quarks probe the color degrees of freedom of the QCD medium at different length scales. Electromagnetic (EM) radiation, such as photons and dileptons, is a unique soft penetrating probe for the entire medium evolution in heavy-ion collisions with a high sensitivity to the collisions’ early-stage. In this talk, I will present recent theoretical developments in electromagnetic radiation from hot QCD matter. I will highlight phenomenological studies of hadrons’ collectivity and EM radiation together as a powerful tool to unravel QCD many-body physics from the complex dynamics of relativistic heavy-ion collisions.