Source chaoticity in relativistic heavy ion collisions at SPS and RHIC

Details Source chaoticity in relativistic heavy ion collisions at SPS and RHIC Source chaoticity in relativistic heavy ion collisions at SPS and RHIC

2006-10-31

arxiv.org/abs/nucl-th/0610125v2

Braz.J.Phys.37:705-707,2007

Physics

Nuclear Physics

Nuclear Theory

3pages, 3 figures, talk given at XXXVI International Symposium on Multiparticle Dynamics September 02-08, 2006 Paraty, Rio de

Scientific paper

We investigate degree of coherence of pion sources produced in relativistic heavy ion collisions using multi-particle interferometry. In order to obtain ``true'' chaoticity, lambda^true from two-pion correlation functions measured in experiments, we make a correction for long-lived resonance decay contributions. Using this lambda^true and the weight factor which are obtained from parameter fitted to two- and three-pion correlation function, we calculate a chaotic fraction epsilon and the number of coherent sources alpha for different colliding energies. The result gives constraints on the source and shows an increase of the minimum number of alpha with multiplicity, although multiplicity independent chaoticity is not excluded.

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