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BIBTEX RIS

Local thermalization in the d + Au system

2005; Elsevier BV; Volume: 633; Issue: 1 Linguagem: Inglês

10.1016/j.physletb.2005.10.096

ISSN

1873-2445

Autores

Georg Wolschin, M. Biyajima, Takuya Mizoguchi, Naomichi Suzuki,

Tópico(s)

Cosmology and Gravitation Theories

Resumo

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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