Eur. Phys. J. C (2011) 71: 1824
https://doi.org/10.1140/epjc/s10052-011-1824-x

Regular Article - Theoretical Physics

Statistical hadronization with exclusive channels in e⁺e⁻ annihilation

¹ Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany
² Università di Firenze and INFN Sezione di Firenze, Florence, Italy

^* e-mail: becattini@fi.infn.it

Received: 10 October 2011
Revised: 15 November 2011
Published online: 21 December 2011

Abstract

We perform a systematic analysis of exclusive hadronic channels in e⁺e⁻ collisions at center-of-mass energies between 2.1 and 2.6 GeV within the statistical hadronization model. Because of the low multiplicities involved, calculations have been carried out in the full microcanonical ensemble, including conservation of energy-momentum, angular momentum, parity, isospin, and all relevant charges. We show that the data are in an overall good agreement with the model for an energy density of about 0.5 GeV/fm³ and an extra-strangeness suppression parameter γ _S ∼0.7, essentially the same values found with fits to inclusive multiplicities at higher energy.