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Local thermalization in d+Au collisions

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Abstract

The extent of a locally equilibrated parton plasma in d+Au collisions at √s NN =200 GeV is investigated as a function of 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 19% of the produced particles.

Keywords

relativistic diffusion model charged-hadron rapidity distributions approach to thermal equilibrium 

PACS

25.75.−q 24.60.Ky 24.10.Jv 05.40.−a 

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Copyright information

© Akadémiai Kiadó 2006

Authors and Affiliations

  • G. Wolschin
    • 1
    • 2
  • T. Biyajima
    • 2
  • T. Mizoguchi
    • 3
  • N. Suzuki
    • 4
  1. 1.Theoretical PhysicsHeidelberg UniversityHeidelbergGermany
  2. 2.Department of PhysicsShinshu UniversityMatsumotoJapan
  3. 3.Toba National College of Maritime TechnologyTobaJapan
  4. 4.Department of Comprehensive ManagementMatsumoto UniversityMatsumotoJapan

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