Equilibration in Quark Gluon Plasma
Santosh K Das, Jan-e Alam, Payal Mohanty
TL;DR
This paper compares the hydrodynamic expansion rate of quark-gluon plasma with partonic scattering rates, revealing the system remains out of equilibrium unless cross sections or the EoS are adjusted.
Contribution
It provides a quantitative comparison of expansion and scattering rates in QGP, highlighting the out-of-equilibrium nature and effects of enhanced cross sections and realistic EoS.
Findings
Scattering rates are smaller than expansion rates in ideal EoS.
Enhancing pQCD cross sections brings the system closer to equilibrium.
Realistic EoS also helps maintain near-equilibrium conditions.
Abstract
The hydrodynamic expansion rate of quark gluon plasma (QGP) is evaluated and compared with the scattering rate of quarks and gluons within the system. Partonic scattering rates evaluated within the ambit of perturbative Quantum Choromodynamics (pQCD) are found to be smaller than the expansion rate evaluated with ideal equation of state (EoS) for the QGP. This indicate that during the space-time evolution the system remains out of equilibrium. Enhancement of pQCD cross sections and a more realistic EoS keep the partons closer to the equilibrium.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.