The e+e- hadronic cross section is measured at the Frascati φ-factory DAΦNE with the KLOE detector using initial state radiation (ISR). Two different analyses have been developed for the channel e+e-→π+π-γ, which differ by the photon polar angle direction. The so-called small angle analysis, in which the photon is not detected, has been published with a total error on the pion form factor of 1.3%. In a second approach, where the photon is emitted at large polar angles, the mass region below 0.35 GeV2 becomes accessible. The status and the prospects of these analyses are reported.
Status report on the KLOE measurement of the hadronic cross section with ISR
GORINI, Edoardo;PRIMAVERA, Margherita;VENTURA, Andrea;
2007-01-01
Abstract
The e+e- hadronic cross section is measured at the Frascati φ-factory DAΦNE with the KLOE detector using initial state radiation (ISR). Two different analyses have been developed for the channel e+e-→π+π-γ, which differ by the photon polar angle direction. The so-called small angle analysis, in which the photon is not detected, has been published with a total error on the pion form factor of 1.3%. In a second approach, where the photon is emitted at large polar angles, the mass region below 0.35 GeV2 becomes accessible. The status and the prospects of these analyses are reported.File in questo prodotto:
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