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Study of QED processes e+ e- --> e+ e- gamma, e+ e- gamma gamma with the SND detector at VEPP-2M

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arxiv hep-ex/9908068 v2 pith:MPAYM3AS submitted 1999-08-31 hep-ex

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
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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 (Budker Institute of Nuclear Physics Novosibirsk Russia)
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keywords gammaprocessesvepp-2mwereaccuracyanglesangularcollider
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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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