The Kloe experiment has collected an integrated luminosity similar to 500pb (1) up to now, which means similar to 1.65 x 10(9) phi decays. The huge amount of events allowed us to measure rare phi decays. We measured the radiative decays of the phi meson into pi(0), eta and eta' (958). These measurements are relevant to assess the mixing in the pseudoscalar nonet as well as to evaluate the gluon content in the. eta' (958). Moreover also the radiative decays into pi(0)pi(0)gamma and eta pi(0)gamma have been measured. These decays are dominated by the final states f(0)(980) and a(0)(980). The measurement of the branching ratios and of the pi(0)pi(0) or eta pi(0) invariant mass spectrum helps to understand the controversial nature of the above scalar mesons.

Rare phi decays

DI DONATO, CAMILLA
2004

Abstract

The Kloe experiment has collected an integrated luminosity similar to 500pb (1) up to now, which means similar to 1.65 x 10(9) phi decays. The huge amount of events allowed us to measure rare phi decays. We measured the radiative decays of the phi meson into pi(0), eta and eta' (958). These measurements are relevant to assess the mixing in the pseudoscalar nonet as well as to evaluate the gluon content in the. eta' (958). Moreover also the radiative decays into pi(0)pi(0)gamma and eta pi(0)gamma have been measured. These decays are dominated by the final states f(0)(980) and a(0)(980). The measurement of the branching ratios and of the pi(0)pi(0) or eta pi(0) invariant mass spectrum helps to understand the controversial nature of the above scalar mesons.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11367/46881
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