2005/03/31 by Georg Wolschin, M. Biyajima, Minoru Biyajima +2
Physics and Astronomy · #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #Statistical Mechanics and Entropy #hep-ph
paper · pdf · doi:10.1016/j.physletb.2005.10.096
published as Phys.Lett. B633 (2006) 38-42 · 9 pages, 3 figures; new table
arxiv created 2005/10/21 · openalex publication_date 2005/11/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/02
The extent of a locally equilibrated parton plasma in d + Au collisions at sNN=200GeV 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.