Publication : t11/110

Determining initial-state fluctuations from flow measurements in heavy-ion collisions

Bhalerao R.S. (Dpt Theoretical Physics, Tata Institute of Fundamental Research (TIFR), Homi Bhabha Road, Mumbai 400 005, INDIA)
Luzum M. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Ollitrault J.-Y. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Abstract:
We present a number of independent flow observables that can be measured using multiparticle azimuthal correlations in heavy-ion collisions. Some of these observables are already well known, such as v2{2} and v2{4}, but most are new--in particular, joint correlations between v1, v2 and v3. Taken together, these measurements will allow for a more precise determination of the medium properties than is currently possible. In particular, by taking ratios of these observables, we construct quantities which are insensitive to the hydrodynamic response of the medium, and thus directly probe the early-time, non-equilibrium QCD dynamics. We present predictions for these ratios using two Monte-Carlo models, and compare to available data.
Année de publication : 2011
Revue : Phys. Rev. C 84 034910 (2011)
DOI : 10.1103/PhysRevC.84.034910
Preprint : arXiv:1104.4740
Langue : Anglais

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