Using a low-background sample of 2.6 × 105 J=ψ → ωηðω → πþπ−π0; η → γγÞ events, about 5 times larger statistics than previous experiments, we present a Dalitz plot analysis of the decay ω → πþπ−π0. It is found that the Dalitz plot distribution differs from the pure P-wave phase space with a statistical significance of 18.9σ. The parameters from the fit to data are in reasonable agreement with those without the cross-channel effect within the dispersive framework, which indicates that the cross-channel effect in ω → πþπ−π0 is not significant
Dalitz plot analysis of the decay ω →π+π-π0
Alekseev, M.;Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Fava, L.;Greco, M.;Hu, J. F.;Lavezzi, L.;Maggiora, M.;Marcello, S.;Pellegrino, J.;Rivetti, A.;Rolo, M.;Sosio, S.;Spataro, S.;Yan, L.;
2018-01-01
Abstract
Using a low-background sample of 2.6 × 105 J=ψ → ωηðω → πþπ−π0; η → γγÞ events, about 5 times larger statistics than previous experiments, we present a Dalitz plot analysis of the decay ω → πþπ−π0. It is found that the Dalitz plot distribution differs from the pure P-wave phase space with a statistical significance of 18.9σ. The parameters from the fit to data are in reasonable agreement with those without the cross-channel effect within the dispersive framework, which indicates that the cross-channel effect in ω → πþπ−π0 is not significantFile in questo prodotto:
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PhysRevD.98.112007.pdf
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