Symmetry, Integrability and Geometry: Methods and Applications (SIGMA)


SIGMA 2 (2006), 074, 12 pages      hep-ph/0512357      https://doi.org/10.3842/SIGMA.2006.074

Combined Analysis of Two- and Three-Particle Correlations in q,p-Bose Gas Model

Alexandre M. Gavrilik
N.N. Bogolyubov Institute for Theoretical Physics, Kyiv, Ukraine

Received December 29, 2005, in final form October 28, 2006; Published online November 07, 2006

Abstract
q-deformed oscillators and the q-Bose gas model enable effective description of the observed non-Bose type behavior of the intercept (''strength'') λ(2)C(2)(K,K) - 1 of two-particle correlation function C(2)(p1,p2) of identical pions produced in heavy-ion collisions. Three- and n-particle correlation functions of pions (or kaons) encode more information on the nature of the emitting sources in such experiments. And so, the q-Bose gas model was further developed: the intercepts of n-th order correlators of q-bosons and the n-particle correlation intercepts within the q,p-Bose gas model have been obtained, the result useful for quantum optics, too. Here we present the combined analysis of two- and three-pion correlation intercepts for the q-Bose gas model and its q,p-extension, and confront with empirical data (from CERN SPS and STAR/RHIC) on pion correlations. Similar to explicit dependence of λ(2) on mean momenta of particles (pions, kaons) found earlier, here we explore the peculiar behavior, versus mean momentum, of the 3-particle correlation intercept λ(3)(K). The whole approach implies complete chaoticity of sources, unlike other joint descriptions of two- and three-pion correlations using two phenomenological parameters (e.g., core-halo fraction plus partial coherence of sources).

Key words: q- and q,p-deformed oscillators; ideal gas of q,p-bosons; n-particle correlations; intercepts of two and three-pion correlators.

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