Production of Eta Mesons in Ee− Annihilations At. Sqrt. S PDF Download

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Production of Eta Mesons in Ee− Annihilations At. Sqrt. S

Production of Eta Mesons in Ee− Annihilations At. Sqrt. S PDF Author:
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Data from ee− annihilations at 29 GeV have been used to measure the production and fragmentation of eta mesons. The signal is observed in the eta .-->. .gamma gamma. decay channel. The fragmentation function for p/sub eta/> 1.5 GeV/c agrees well with the shapes predicted by both the Lund and Webber models. However, the mean multiplicity is measured to be = 0.37 +- 0.08 eta mesons per hadronic annihilation event, which is significantly lower than the values predicted by either model. 6 refs., 2 figs., 1 tab.
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