A sample of 1.25 × 109 Ø decays, collected with the KLOE detector at the Frascati Ø-factory DAPdblNE at center of mass energy ∼ MØ, has been used to study the radiative decay Ø → η π 0γ. This decay is dominated by Ø Ø → α0(980)γ. Two decay chains, corresponding to η → γ γand η → π+ π- π0, have been selected. We found respectively: Br(Ø → η π0 γ) = (6.92 ± 0.10stat. ± 0.20syst.) × 10-5 and (7.19 ±0.17stat. ± 0.24syst.) × 10-5. The η Pi; 0 invariant mass distributions have been fitted to obtain the relevant a0(980) parameters. Key words: e+e - collisions, Ø radiative decays, Scalar mesons.
Study of the radiative decay Ø → α0(980) γ with the KLOE detector
Martini M;Meola S;
2007-01-01
Abstract
A sample of 1.25 × 109 Ø decays, collected with the KLOE detector at the Frascati Ø-factory DAPdblNE at center of mass energy ∼ MØ, has been used to study the radiative decay Ø → η π 0γ. This decay is dominated by Ø Ø → α0(980)γ. Two decay chains, corresponding to η → γ γand η → π+ π- π0, have been selected. We found respectively: Br(Ø → η π0 γ) = (6.92 ± 0.10stat. ± 0.20syst.) × 10-5 and (7.19 ±0.17stat. ± 0.24syst.) × 10-5. The η Pi; 0 invariant mass distributions have been fitted to obtain the relevant a0(980) parameters. Key words: e+e - collisions, Ø radiative decays, Scalar mesons.File in questo prodotto:
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