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Observation of inclusive η production in ee annihilation at CM energies of 34 GeV
Authors:G Battistoni  E Bellotti  G Bologna  P Campana  C Castagnoli  V Chiarella  A Ciocio  DC Cundy  B D&#x;Etorre-Piazoli  E Fiorini  P Galeotti  E Iarocci  C Liguori  G Mannocchi  GP Murtas  P Negri  G Nicoletti  P Picchi  L Zanotti
Institution:

Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

II. Institut f. Experimentalphysik, Universität Hamburg, Germany

Physikalisches Institut der Universität Heidelberg, Germany

University of lancaster, England

University of Manchester, England

Rutherford Appleton Laboratory, Chilton, England

a Lab. of Int. Coll. on Elementary Particle Physics, University of Tokyo, Japan

b Department of Physics, University of Tokyo, Japan

Abstract:The inclusive production of η mesons at CM energies around 34 GeV has been studied for e+e annihilation into hadrons. The average number of η-mesons per event is found to be 0.72 ± 0.10 (stat.) ± 0.18 (syst.). The abundance of η's is studied as a function of event shape parameters and it is compared to the corresponding π0 rates.
Keywords:
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