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+ | ====== TTP02-43 The radiative return at phi- and B-factories: | ||
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+ | cross section of electron--positron annihilation into hadrons over a wide range | ||
+ | of energies. The large luminosity of present phi- and B-factories easily | ||
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+ | rate for events with collinear photons, however, is enhanced by a large | ||
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+ | The Monte Carlo generator PHOKHARA, which includes next to leading order | ||
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+ | for muon and pion pair production and final states with four pions. | ||
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+ | and 10.6 GeV, are presented: the magnitude of these new corrections is studied, | ||
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+ | </ | ||
+ | |**H. Czyz, A. Grzelinska, J. H. K"uhn, G. Rodrigo** | ||
+ | |** Eur. Phys. J. C 27 563-575 2003 ** | | ||
+ | | {{preprints: | ||
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