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VOLUME 78 (2003) | ISSUE 2 | PAGE 61
QED corrections in radiative return method at measurement of the e^+e^-\rightarrow \pi^+\pi^- cross-section below 1 GeV
PACS: 12.20.-m, 13.40.-f, 13.60.-Hb, 13.88.+e
Abstract
We discuss radiative corrections at the measurement of the e^+e^-\rightarrow \pi^+\pi^- cross-section by the radiative return method without photon tagging. The radiative corrections to the initial-state radiation process are computed for DAΦNE conditions, using the quasi-real electron approximation for both, the cross-section and the underlying kinematics. The efficiency of experimental rules for event selection by the restrictions on the lost invariant mass and so-called "track mass" is estimated. Some numerical calculations illustrate our analytical results.