Hadronization revisited : the dynamics behind hadro-chemical equilibrium

  • The multiplicity of hadronic species created in elementary, and in nucleus-nucleus collisions, are known to be well reproduced by the statistical hadronization model, in its canonical and grand-canonical versions.To understand the origin of the implied equilibrium we revisit the hadronization models developed for e+e- annihilation to hadrons which imply spatial color pre-confinement clusters forming at the end of the pQCD evolution, which decays into on-shell hadrons/resonances. The classical ensemble description arises as a consequence of decoherence and phase space dominance during cluster formation, and decay.For A+A collisions we assume that hadronization occurs from similar singlet clusters which will overlap spatially owing to the extreme density. This is imaged in the transition to the grand-canonical ensemble.This transition sets in with increasing A and collision centrality. It can be described by a percolation model.

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Author:Reinhard StockGND
Parent Title (German):Proceedings of Science, Critical Point and Onset of Deconfinement, July 3 - 6 2006, Florence, Italy
Document Type:Article
Date of Publication (online):2007/06/14
Year of first Publication:2007
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2007/06/14
Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
Source:Critical Point and Onset of Deconfinement, July 3 - 6 2006, Florence, Italy. - arXiv:nucl-th/0703050v1
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht