Extracting the shear viscosity of the quark-gluon plasma from flow in ultra-central heavy-ion collisions

2012/10/22 by Matthew Luzum, Jean-Yves Ollitrault · 1 citation
Physics and Astronomy · #nucl-th #hep-ph

paper · pdf · doi:10.1016/j.nuclphysa.2013.02.028

published as Nuclear Physics A 904-905 (2013) pp. 377-380 · 4 pages, 2 figures, Proceedings for Quark Matter 2012

arxiv created 2012/10/22 · arxiv updated 2013/05/14

Abstract

We propose a method for extracting the shear viscosity over entropy density ratio (eta/s) of the quark-gluon plasma from experimental data. We argue that uncertainty due to poor knowledge of the earliest stages of a heavy-ion collision is smallest for ultra-central events. The most precise value of eta/s can thus be obtained from a global fit to p_T-integrated Fourier harmonics of azimuthal correlations. We further outline a method for quantifying the overall uncertainty in the extracted value. Only after a comprehensive and systematic accounting of all sources of uncertainty can a reliable measurement be claimed. In these proceedings we report preliminary results; full and final results will be presented in a separate publication.

Cited by

• Impact of Initial-State Nuclear and Sub-Nucleon Structures on Ultra-Central Puzzle in Heavy Ion Collisions

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