We have studied the e+e− → ωπ0 cross section in the √ s interval 1000–1030 MeV using the π+π−π0π0 and π0π0γ final states with a sample of ∼ 600 pb−1 collected with the KLOE detector at DANE. By fitting the observed interference pattern around Mφ for both final states, we extract the ratio of the decay widths Γ (ω→π0γ )/Γ (ω→π+π−π0) = 0.0897 ± 0.0016 and derive the branching fractions BR(ω → π+π−π0) = (90.24 ± 0.19)%, BR(ω → π0γ ) = (8.09 ± 0.14)%. The parameters describing the e+e− →π+π−π0π0 reaction around Mφ are also used to extract the branching fraction for the OZI and G-parity violating φ→ωπ0 decay: BR(φ→ωπ0) = (4.4±0.6)×10−5.

Study of the process e(+)e(-) -> omega pi(0) in the phi-meson mass region with the KLOE detector / Ambrosino, F; Antonelli, A; Antonelli, M; Archilli, F; Beltrame, P; Bencivenni, G; Bertolucci, S; Bini, Cesare; Bloise, C; Bocchetta, S; Bossi, F; Branchini, R; Campana, P; Capon, G; Capussela, T; Ceradini, F; Ciambrone, P; Crucianelli, F; DE LUCIA, E; DE SANTIS, Antonio; DE SIMONE, P; DE ZORZI, Guido; Denig, A; DI DOMENICO, Antonio; DI DONATO, C; DI MICCO, B; Dreucci, M; Felici, G; Ferrer, Ml; Fiore, Salvatore; Franzini, Paolo; Gatti, C; Gauzzi, Paolo; Giovannella, S; Graziani, E; Kluge, W; Lanfranchi, G; LEE FRANZINI, J; Leone, D; Martini, M; Massarotti, P; Meola, S; Miscetti, S; Moulson, M; Muller, S; Murtas, F; Napolitano, M; Nguyen, F; Palutan, M; Pasqualucci, E; Passeri, A; Patera, Vincenzo; Perfetto, F; Santangelo, P; Sciascia, B; Sciubba, Adalberto; Sibidanov, A; Spadaro, T; Testa, M; Tortora, L; Valente, P; Venanzoni, G; Versaci, R; Xu, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 669:(2008), pp. 223-228. [10.1016/j.physletb.2008.09.056]

Study of the process e(+)e(-) -> omega pi(0) in the phi-meson mass region with the KLOE detector

BINI, Cesare;DE SANTIS, ANTONIO;DE ZORZI, Guido;DI DOMENICO, Antonio;FIORE, SALVATORE;FRANZINI, Paolo;GAUZZI, Paolo;PATERA, Vincenzo;SCIUBBA, Adalberto;
2008

Abstract

We have studied the e+e− → ωπ0 cross section in the √ s interval 1000–1030 MeV using the π+π−π0π0 and π0π0γ final states with a sample of ∼ 600 pb−1 collected with the KLOE detector at DANE. By fitting the observed interference pattern around Mφ for both final states, we extract the ratio of the decay widths Γ (ω→π0γ )/Γ (ω→π+π−π0) = 0.0897 ± 0.0016 and derive the branching fractions BR(ω → π+π−π0) = (90.24 ± 0.19)%, BR(ω → π0γ ) = (8.09 ± 0.14)%. The parameters describing the e+e− →π+π−π0π0 reaction around Mφ are also used to extract the branching fraction for the OZI and G-parity violating φ→ωπ0 decay: BR(φ→ωπ0) = (4.4±0.6)×10−5.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/225273
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