Study of the process e+e- -> omega p0 with the KLOE detector
Abstract
Using ~600 pb-1 collected with the KLOE detector at DAPhiNE, we have studied the production cross section of pi+ pi- pi0 pi0 and p0p0 gamma final states in e+e- collisions at center of mass energies between 1000 and 1030 MeV. By fitting the observed interference pattern around Mphi for both final states, we extract a measurement (preliminary) for the ratio Gamma(omega -> pi0 gamma)/Gamma(omega -> pi+ pi- pi0) = 0.0934 +- 0.0022. Since these two final states represent the 98% of the omega decay channels, we use unitarity to derive BR(omega -> pi+pi-pi0)= (89.94 +- 0.23)% and BR(omega -> pi0 gamma) = (8.40 +- 0.19)%. Moreover, the parameters describing the e+e- -> pi+ pi- pi0 pi0 reaction around Mphi are used to extract the branching fraction for the OZI and G-parity violating phi -> omega pi0 decay: BR(phi -> omega pi0) = (5.63 +- 0.70) x 10^-5.
Cite
@article{arxiv.0707.4130,
title = {Study of the process e+e- -> omega p0 with the KLOE detector},
author = {KLOE collaboration and F. Ambrosino and A. Antonelli and M. Antonelli and F. Archilli and C. Bacci and P. Beltrame and G. Bencivenni and S. Bertolucci and C. Bini and C. Bloise and S. Bocchetta and V. Bocci and F. Bossi and P. Branchini and R. Caloi and P. Campana and G. Capon and T. Capussela and F. Ceradini and S. Chi and G. Chiefari and P. Ciambrone and E. De Lucia and A. De Santis and P. De Simone and G. De Zorzi and A. Denig and A. Di Domenico and C. Di Donato and S. Di Falco and B. Di Micco and A. Doria and M. Dreucci and G. Felici and A. Ferrari and M. L. Ferrer and G. Finocchiaro and S. Fiore and C. Forti and P. Franzini and C. Gatti and P. Gauzzi and S. Giovannella and E. Gorini and E. Graziani and M. Incagli and W. Kluge and V. Kulikov and F. Lacava and G. Lanfranchi and J. Lee-Franzini and D. Leone and M. Martini and P. Massarotti and W. Mei and S. Meola and S. Miscetti and M. Moulson and S. Müller and F. Murtas and M. Napolitano and F. Nguyen and M. Palutan and E. Pasqualucci and A. Passeri and V. Patera a and f and F. Perfetto and M. Primavera and P. Santangelo and G. Saracino and B. Sciascia and A. Sciubba and F. Scuri and I. Sfiligoi and T. Spadaro and M. Testa and L. Tortora and P. Valente and B. Valeriani and G. Venanzoni and R. Versaci and G. Xu},
journal= {arXiv preprint arXiv:0707.4130},
year = {2008}
}
Comments
Contributed paper to Lepton Photon 2007