Equilibration of quark-gluon plasma in heavy-ion collisions

by Dr Xiaojian Du (Bielefeld Univeristy)

Wednesday 19 Oct 2022, 15:00 → 16:00 Asia/Shanghai

Non-equilibrium systems are omnipresent in nature. QCD plasma out of equilibrium and its equilibration are of particular interest given that the relativistic heavy-ion collisions (HICs) produce the non-equilibrium quark-gluon plasma (QGP) which eventually emerges to thermal hydrodynamic states. We investigate the kinetic and chemical equilibration of weakly coupled QCD plasma at finite density with a numerical implementation of QCD effective kinetic theory based on leading-order QCD, revealing the relevant equilibration pattern and turbulent nature of the QCD plasma far from equilibrium. We then show its equilibration in HICs as an attractor towards hydrodynamics. Based on that, some phenomenological applications such as pre-equilibrium dilepton production, non-hydrodynamics modes in HICs are discussed.

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Dr. Xiaojian Du, received his BS degree in Physics from University of Science and Technology of China, and his PhD degree from Texas A&M University. He is now a postdoctoral research associate at Bielefeld Univeristy. His main research interests are non-equilibrium QCD physics, including non-equilibrium dynamics of quark-gluon plasma, heavy-flavors, electromagnetic probes. He also works on applying quantum computing technology to high-energy nuclear physics.

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