Local Thermalization in the d + Au System

Details Local Thermalization in the d + Au System Local Thermalization in the d + Au System

2005-03-22

arxiv.org/abs/hep-ph/0503212v2

Phys.Lett. B633 (2006) 38-42

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 figures; new table

Scientific paper

10.1016/j.physletb.2005.10.096

The extent of a locally equilibrated parton plasma in d + Au collisions at sqrt(s_NN) = 200 GeV is investigated as a function of collision centrality in a nonequilibrium-statistical framework. Based on a three-sources model, analytical solutions of a relativistic diffusion equation are in precise agreement with recent data for charged-particle pseudorapidity distributions. The moving midrapidity source indicates the size of the local thermal equilibrium region after hadronization. In central d + Au collisions it contains about 19% of the produced particles, and its relative importance rises with decreasing centrality.

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