Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 17: Elektromagnetische und hadronische Proben II
HK 17.12: Vortrag
Dienstag, 18. März 2003, 18:45–19:00, B
KLOE results on φ radiative decays — •Barbara Valeriani — barbara.valeriani@iekp.fzk.de
The KLOE experiment at DAΦNE, the e+e− collider working at the φ(1020) meson, has started to realize its wide physics program with the analysis of the statistics collected in 2000 (∼ 20 pb−1) and in 2001/2002 (∼ 160 pb−1, ∼ 300 pb−1). Radiative decays of the φ have been investigated. A precise knowledge of the η / η′ mixing angle has been achieved by studying the decays φ → η γ, φ → η′ γ.The measurement of the branching ratios of the decays φ → π0 π0 γ, φ → η π0 γ has allowed to study the couplings of the f0 (a0) to KK and to ππ (ηπ), giving new hints on the controversial nature of the two scalar mesons. A first evidence of the decay f0→ π+π− has been found in the analysis of the process e+e−→ π+π−γ. Improved results are expected from the analysis of the large statistics collected in 2002, that will significantly reduce the present statistical and systematical errors.