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). (C) 2002 Elsevier Science B.V. All rights reserved. RI Gauzzi, Paolo/D-2615-2009; valente, paolo/A-6640-2010; ANTONELLI, ANTONELLA/C-6238-2011; Di Domenico, Antonio/G-6301-2011; De Lucia, Erika/D-2250-2011; Passalacqua, Luca/F-5127-2011; branchini, paolo/A-4857-2011; Murtas, Fabrizio/B-5729-2012
Study of the decay phi ->eta pi(0)gamma with the KLOE detector
SCURI, Fabrizio;
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). (C) 2002 Elsevier Science B.V. All rights reserved. RI Gauzzi, Paolo/D-2615-2009; valente, paolo/A-6640-2010; ANTONELLI, ANTONELLA/C-6238-2011; Di Domenico, Antonio/G-6301-2011; De Lucia, Erika/D-2250-2011; Passalacqua, Luca/F-5127-2011; branchini, paolo/A-4857-2011; Murtas, Fabrizio/B-5729-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
