Study of the radiative decay phi to a0(980) gamma with the KLOE detector

2007/07/31 by The KLOE Collaboration
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.0707.4609

Abstract

A sample of 1.25x10⁹ phi decays, collected with the KLOE detector at the Frascati phi-factory DAFNE at center of mass energy ~ Mphi, has been used to study the radiative decay phi to eta pi0 gamma. This decay is dominated by phi to a0(980) gamma. Two decay chains, corresponding to eta to gamma gamma and eta to pi+ pi- pi0, have been selected. We found respectively: Br(phi to eta pi0 gamma)=(6.92 +/- 0.10 (stat.) +/- 0.20 (syst.))x10^(-5) and (7.19 +/- 0.17 (stat.) +/- 0.24 (syst.))x 10 ^(-5). The eta pi0 invariant mass distributions have been fitted to obtain the relevant a0(980) parameters.

Related

• eta Physics and phi Radiative Decays at Kloe
• KLOE results on f0(980), a0(980) scalars and eta decays
• KLOE first results on hadronic physics
• Detection of phi --> eta' photon, phi --> eta photon in pi+ pi- three photons final state with KLOE at DAFNE
• Search for phi to K0 K0bar gamma decay with KLOE