Measurement of the Hadronic Cross Section at Kloe Using the Radiative Return
نویسنده
چکیده
We report on the measurement of the hadronic cross section below 1 GeV at the electron-positron-collider DAΦNE, using the multiple purpose detector KLOE. The radiative return, which is due to initial state radiation (ee → γ+hadrons), allows us to obtain the cross section for variable center-of-mass-energies of the hadronic system from the 2mπ threshold up to 1.02 GeV. This measurement can be performed while DAΦNE is running with a fixed accelerator energy on the φ mass (1.02 GeV). For the exclusive process ee → ππγ, the status of the analysis and first preliminary results of the invariant mass spectrum of the two-pion-state are presented. 1 HADRONIC CROSS SECTION AT DAΦNE
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