Study of QED processes e+ e- --> e+ e- gamma, e+ e- gamma gamma with the SND detector at VEPP-2M
M. N. Achasov, S. E. Baru, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, S. V. Burdin, T. V. Dimova, S. I. Dolinsky, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, A. A. Korol, S. V. Koshuba, A. P. Lysenko, I. N. Nesterenko, E. V. Pakhtusova, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, Yu. V. Usov
Abstract
Results of the SND experiment at the VEPP-2M e+ e- collider on the QED processes e+ e- --> e+ e- gamma and e+ e- --> e+ e- gamma gamma with production at large angles are presented. Energy and angular distributions of the final particles were studied. No deviations from QED with an accuracy of 3.8% for the first process and 10.3% for the second were found.
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