Chemical equilibration of QGP in hadronic collisions

2019/10/15 by Aleksi Kurkela, Kurkela, Aleksi, Aleksas Mazeliauskas +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.48550/arxiv.1910.06664

5 pages, 1 figure, proceedings for the XVIII International Conference on Strangeness in Quark Matter (SQM 2019), based on arXiv:1811.03040, arXiv:1811.03068

arxiv created 2019/10/15 · openalex publication_date 2019/10/15 · arxiv updated 2019/10/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We performed state-of-the-art QCD effective kinetic theory simulations of chemically equilibrating QGP in longitudinally expanding systems. We find that chemical equilibration takes place after hydrodynamization, but well before local thermalization. By relating the transport properties of QGP and the system size we estimate that hadronic collisions with final state multiplicities dN_ch/dη> 10² live long enough to reach approximate chemical equilibrium for all collision systems. Therefore we expect the saturation of strangeness enhancement to occur at the same multiplicity in proton-proton, proton-nucleus and nucleus-nucleus collisions.

Citations

• Chemical Equilibration in Hadronic Collisions
• Chemical Equilibration in Weakly Coupled QCD

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