Statistical hadronization with exclusive channels in e+e- annihilation
L. Ferroni (University of Frankfurt), F. Becattini (University of, Florence)
TL;DR
This paper analyzes exclusive hadronic channels in low-energy e+e- collisions using a detailed statistical hadronization model, finding good agreement with data and consistent parameters with higher energy studies.
Contribution
It provides a comprehensive microcanonical analysis of exclusive channels in e+e- annihilation at low energies, including all conservation laws, which is novel.
Findings
Good agreement with experimental data at 2.1-2.6 GeV
Energy density around 0.5 GeV/fm^3
Strangeness suppression parameter gamma_S ~ 0.7
Abstract
We perform a systematic analysis of exclusive hadronic channels in e+e- collisions at centre-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 is in an overall good agreement with the model for an energy density of about 0.5 GeV/fm^3 and an extra strangeness suppression parameter gamma_S ~ 0.7, essentially the same values found with fits to inclusive multiplicities at higher energy.
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