Measurement of the hadronic cross section at KLOE using the radiative return

Details Measurement of the hadronic cross section at KLOE using the radiative return Measurement of the hadronic cross section at KLOE using the radiative return

2001-06-28

arxiv.org/abs/hep-ex/0106100v1

eConf C010430:T07,2001

Physics

High Energy Physics

High Energy Physics - Experiment

Invited talk at the workshop "e+e- Physics at Intermediate Energies", SLAC, April 30 - May 2, 2001 (T07)

Scientific paper

We report on the measurement of the hadronic cross section below 1GeV at the electron-positron-collider DAPHNE, using the multiple purpose detector KLOE. The radiative return, which is due to initial state radiation (e+ e- \to gamma + hadrons), allows us to obtain the cross section for variable center-of-mass-energies of the hadronic system from the 2m_pi threshold up to 1.02GeV. This measurement can be performed while DAPHNE is running with a fixed accelerator energy on the phi mass (1.02 GeV). For the exclusive process e+ e- \to pi+ pi- gamma, the status of the analysis and first preliminary results of the invariant mass spectrum of the two-pion-state are presented.

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