An extension of the Statistical Bootstrap Model to include Strangeness. Implications on Particle Ratios

Details An extension of the Statistical Bootstrap Model to include Strangeness. Implications on Particle Ratios An extension of the Statistical Bootstrap Model to include Strangeness. Implications on Particle Ratios

1998-06-03

arxiv.org/abs/hep-ph/9806240v2

Phys.Rev. D58 (1998) 034009

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 38 figures, all the figures are joined in one file. accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.58.034009

The Statistical Bootstrap Model (SBM) is extended to describe hadronic systems which carry the quantum number of strangeness. The study is conducted in the three-dimensional space of temperature, up-down and strange chemical potentials, wherein the existence of a ``critical'' surface is established, which sets the limits of the hadronic phase of matter. A second surface, defined by the null expectation value of strangeness number is also determined. The approach of the latter surface to the critical one becomes the focal point of the present considerations. Two different versions of the extended SBM are examined, corresponding to the values 2 and 4 for the exponent, which determines the asymptotic fall-off of the mass spectrum. It is found that the version with the value 4 has decisive physical advantages. This model is subsequently adopted to discuss (strange) particle ratios pertaining to multiparticle production processes, for which a thermal equilibrium mode of description applies.

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