Event-by-event anisotropic flow in heavy-ion collisions from combined Yang-Mills and viscous fluid dynamics

2012/09/27 by Charles Gale, Sangyong Jeon, Bjoern Schenke +2 · 2 citations
Physics and Astronomy · #nucl-th #hep-ph #nucl-ex

paper · pdf · doi:10.1103/physrevlett.110.012302

5 pages, 9 figures

arxiv created 2012/09/27 · arxiv updated 2013/05/29

Abstract

Anisotropic flow coefficients v₁-v₅ in heavy ion collisions are computed by combining a classical Yang-Mills description of the early time glasma flow with the subsequent relativistic viscous hydrodynamic evolution of matter through the quark-gluon plasma and hadron gas phases. The glasma dynamics, as realized in the IP-Glasma model, takes into account event-by-event geometric fluctuations in nucleon positions and intrinsic sub-nucleon scale color charge fluctuations; the pre-equilibrium flow of matter is then matched to the MUSIC algorithm describing viscous hydrodynamic flow and particle production at freeze-out. The IP-Glasma+MUSIC model describes well both transverse momentum dependent and integrated v_n data measured at the Large Hadron Collider (LHC) and the Relativistic Heavy Ion Collider (RHIC). The model also reproduces the event-by-event distributions of v₂, v₃ and v₄ measured by the ATLAS collaboration. The implications of our results for better understanding of the dynamics of the glasma as well as for the extraction of transport properties of the quark-gluon plasma are outlined.

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