A thermodynamical model of hadron production in $e^+e^-$ collisions

Abstract

The hadron production in $e^+e^-$ collisions is studied assuming that particles originate in a hadron gas at thermal and chemical equilibrium. The parameters of the hadron gas are determined with a fit to the average multiplicities of various hadron species measured at LEP and PEP-PETRA colliders. An impressive agreement is found between the predictions of this model and data for almost all particles over a range of production rate of four orders of magnitude. The temperature values found at the centre of mass energies of LEP and PEP-PETRA are around $165$ MeV.

16 pages, LaTeX file, uses epsfig.sty and cite.sty, 4 figures added as uu-encoded g-zipped tarred eps-files, to appear in Proc. XXV Int. Symp. on Multiparticle Dynamics, Stara Lesna, Slovakia, September 12-16, 1995