Canonical Strangeness and Distillation Effects in Hadron Production

Details Canonical Strangeness and Distillation Effects in Hadron Production Canonical Strangeness and Distillation Effects in Hadron Production

2004-11-30

arxiv.org/abs/nucl-th/0411125v2

J.Phys. G31 (2005) 583-598

Physics

Nuclear Physics

Nuclear Theory

20 pages, 2 figures; typos corrected, 2 references added, minor corrections in text and figures

Scientific paper

10.1088/0954-3899/31/7/005

Strangeness canonical ensemble for Maxwell-Boltzmann statistics is reconsidered for excited nuclear systems with non-vanishing net strangeness. A new recurrence relation method is applied to find the partition function. The method is first generalized to the case of quantum strangeness canonical ensemble. Uncertainties in calculation of the K+/pi+ excitation function are discussed. A new scenario based on the strangeness distillation effect is put forward for a possible explanation of anomalous strangeness production observed at the bombarding energy near 30 AGeV. The peaked maximum in the K+/pi+ ratio is considered as a sign of the critical end-point reached in evolution of the system rather than a latent heat jump emerging from the onset of the first order deconfinement phase transition.

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