Bochum 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
HK: Fachverband Hadronen und Kerne
HK 47: Hadron Structure and Spectroscopy II
HK 47.7: Group Report
Wednesday, March 18, 2009, 15:30–16:00, H-ZO 30
Results in hadronic physics with the KLOE experiment in Frascati — •Stefan E. Müller — Institut für Kernphysik Universität Mainz, J.-J.-Becher-Weg 45, 55128 Mainz
The KLOE experiment at the DAΦNE e+e− collider in Frascati covers a wide spectrum of physics. Concerning hadronic physics, a new precise measurement of the pion form factor in the mass range between 0.35 and 0.95 GeV2 has been published recently, selecting events in which the e+ or the e− emits a hard photon in the initial state. This “radiative return” to the ρ and ω resonances allows to access the energy region below the DAΦNE energy, which is fixed to Mφ≃1.02 GeV. In addition, new results have been obtained in the scalar sector, like an upper limit on the branching ratio for φ → K0K0γ, which proceeds through f0(980)/a0(980)γ, and a high statistics result on the φ → a0γ decay. For η/η′ physics, a final result for the η→π+π−e+e− branching ratio has been obtained, while the KLOE measurement of the gluonium content of the η′ has been updated. Also, the cross section parameters for the processes e+e− → π+π−π0π0 and e+e− → π0π0γ, which both proceed through the ωπ0 intermediate state, have been measured. In the talk, these new KLOE results will be presented, and a brief overview on ongoing KLOE analyses in hadronic physics will be given.