In a sample of 5.3 x 10(7), phi-decays observed with the KLOE detector at the Frascati phi-factory DAPhiDNE we find 605 etapi(o)gamma events with eta --> gammagamma and 197 etapi(o)gamma events with eta --> pi(+)pi(-)pi(o). The decay etapi(o)gamma is dominated by the process phi --> a(o)gamma. From a fit to the etapi(o) mass spectrum we find BR(phi --> a(o)(980)gamma) = (7.4 +/- 0.7) x 10(-5).
Study of the decay phi -> eta pi0 gamma with the KLOE detector
GORINI, Edoardo;PRIMAVERA, Margherita;VENTURA, Andrea;
2002-01-01
Abstract
In a sample of 5.3 x 10(7), phi-decays observed with the KLOE detector at the Frascati phi-factory DAPhiDNE we find 605 etapi(o)gamma events with eta --> gammagamma and 197 etapi(o)gamma events with eta --> pi(+)pi(-)pi(o). The decay etapi(o)gamma is dominated by the process phi --> a(o)gamma. From a fit to the etapi(o) mass spectrum we find BR(phi --> a(o)(980)gamma) = (7.4 +/- 0.7) x 10(-5).File in questo prodotto:
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