PS02 Rare Decays
Rare φ decays
I.N.F.N. Sezione di Napoli, Dip. Scienze Fisiche, Complesso Universitario MSA, Via Cinthia Ed.G 80126 Napoli, Italy
Accepted: 28 October 2003
Published online: 31 October 2003
The Kloe experiment has collected an integrated luminosity ~ 500 pb –1 up to now, which means ~ 1.65×109 φ decays. The huge amount of events allowed us to measure rare φ decays. We measured the radiative decays of the φ meson into π 0, η and η ′(958). These measurements are relevant to assess the mixing in the pseudoscalar nonet as well as to evaluate the gluon content in the η ′(958). Moreover also the radiative decays into π 0 π 0 γ and η π 0 γ have been measured. These decays are dominated by the final states f0(980) and a 0(980). The measurement of the branching ratios and of the π 0 π 0 or η π 0 invariant mass spectrum helps to understand the controversial nature of the above scalar mesons.
PACS: PACS-key e + e – collisions – PACS-key φ radiative decays
© Società Italiana di Fisica, Springer-Verlag, 2004