Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector

The KLOE Collaboration: F. Ambrosino , A. Antonelli , M. Antonelli , F. Archilli , P. Beltrame , G. Bencivenni , S. Bertolucci , C. Bini

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C. Bloise S. Bocchetta F. Bossi P. Branchini P. Campana G. Capon T. Capussela F. Ceradini P. Ciambrone F. Crucianelli E. De Lucia A. De Santis P. De Simone G. De Zorzi A. Denig A. Di Domenico C. Di Donato B. Di Micco M. Dreucci G. Felici M. L. Ferrer S. Fiore P. Franzini C. Gatti P. Gauzzi S. Giovannella E. Graziani W. Kluge G. Lanfranchi J. Lee-Franzini D. Leone M. Martini P. Massarotti S. Meola S. Miscetti M. Moulson S. M\"uller F. Murtas M. Napolitano F. Nguyen M. Palutan E. Pasqualucci A. Passeri V. Patera F. Perfetto P. Santangelo B. Sciascia A. Sciubba A. Sibidanov T. Spadaro M. Testa L. Tortora P. Valente G. Venanzoni R. Versaci G. Xu

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classification ✦ hep-ex

keywords omegapi0omegaaroundbranchingdecaydetectorextractfinal

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We have studied the e+e- -> omegapi0 cross section in the sqrt(s) interval 1000-1030 MeV using the pi+pi-pi0pi0 and pi0pi0gamma final states with a sample of ~600 pb^-1 collected with the KLOE detector at DAFNE. By fitting the observed interference pattern around M_phi for both final states, we extract the ratio of the decay widths Gamma(omega->pi0gamma)/Gamma(omega->pi+pi-pi0) = 0.0897 +- 0.0016 and derive the branching fractions BR(omega -> pi+pi-pi0)= (90.24 +- 0.19)%, BR(omega -> pi0gamma) = (8.09 +- 0.14)%. The parameters describing the e+e- -> omegapi0 reaction around M_\phi are also used to extract the branching fraction for the OZI and G-parity violating phi -> omegapi0 decay: BR(phi->omegapi0) = (4.4 +- 0.6)x10^-5.

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Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector

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