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arxiv: 1908.02113 · v1 · pith:YX5BP24Hnew · submitted 2019-08-06 · ⚛️ nucl-th · hep-ph· hep-th

The First fm/c of Heavy-Ion Collisions

classification ⚛️ nucl-th hep-phhep-th
keywords heavy-ioncollisionstheoreticaldynamicsearlyfirstmechanismsnon-abelian
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We present an introductory review of the early time dynamics of high-energy heavy-ion collisions and the kinetics of high temperature QCD. The equilibration mechanisms in the quark-gluon plasma uniquely reflect the non-abelian and ultra-relativistic character of the many body system. Starting with a brief expose of the key theoretical and experimental questions, we provide an overview of the theoretical tools employed in weak coupling studies of the early time non-equilibrium dynamics. We highlight theoretical progress in understanding different thermalization mechanisms in weakly coupled non-abelian plasmas, and discuss their relevance in describing the approach to local thermal equilibrium during the first ${\rm fm}/c$ of a heavy-ion collision. Some important connections to the phenomenology of heavy-ion collisions are also briefly discussed.

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