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Abstract
The radiative corrections to lowest order for the reactions e +e − giving any final state f, different from e +e −, are calculated, taking into account the contributions coming from the photons emitted by the electrons. Then an application of these results to the process e +e − → π + π − is done in the experimental conditions of ACO. The difference with previous results arises from: (i) a rigorous calculation of Feynman diagrams without using the “quasi-réel” process approximation, (ii) the error in the Coulomb terms, and (iii) a precise evaluation of the photon phase space.
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