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arxiv: 1507.08013 · v2 · pith:PSX2EZPFnew · submitted 2015-07-29 · ✦ hep-ex

Study of the process e^+e^-to pbar{p} in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

R.R. Akhmetshin , A.N. Amirkhanov , A.V. Anisenkov , V.M. Aulchenko , V.Sh. Banzarov , N.S. Bashtovoy , D.E. Berkaev , A.E. Bondar
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A.V. Bragin S.I. Eidelman D.A. Epifanov L.B. Epshteyn A.L. Erofeev G.V. Fedotovich S.E. Gayazov A.A. Grebenuk S.S. Gribanov D.N. Grigoriev E.M. Gromov F.V. Ignatov V.L. Ivanov S.V. Karpov A.S. Kasaev V.F. Kazanin B.I. Khazin A.N. Kirpotin I.A. Koop O.A. Kovalenko A.N. Kozyrev E.A. Kozyrev P.P. Krokovny A.E. Kuzmenko A.S. Kuzmin I.B. Logashenko P.A. Lukin K.Yu. Mikhailov V.S. Okhapkin A.V. Otboev Yu.N. Pestov S.G. Pivovarov A.S. Popov G.P. Razuvaev A.L. Romanov A.A. Ruban N.M. Ryskulov A.E. Ryzhenenkov V.E. Shebalin D.N. Shemyakin B.A. Shwartz D.B. Shwartz A.L. Sibidanov P.Yu. Shatunov Yu.M. Shatunov E.P. Solodov V.M. Titov A.A. Talyshev A.I. Vorobiov Yu.V. Yudin Yu.M. Zharinov
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classification ✦ hep-ex
keywords cmd-3detectorenergyprocessangularcollectedcollidercross
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Using a data sample of 6.8 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider we select about 2700 events of the $e^+e^- \to p\bar{p}$ process and measure its cross section at 12 energy ponts with about 6\% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio $|G_{E}/G_{M}| = 1.49 \pm 0.23 \pm 0.30$.

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