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Study of the process e^+e^- to K^+K^- in the center-of-mass energy range 1010--1060~MeV with the CMD-3 detector

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arxiv 1710.02989 v1 pith:GINWT7KD submitted 2017-10-09 hep-ex

Study of the process e^+e^- to K^+K^- in the center-of-mass energy range 1010--1060~MeV with the CMD-3 detector

E.A.Kozyrev , E.P.Solodov , R.R.Akhmetshin , A.N.Amirkhanov , A.V.Anisenkov , V.M.Aulchenko , V.S.Banzarov , N.S.Bashtovoy
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D.E.Berkaev A.E.Bondar 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 F.V.Ignatov V.L.Ivanov S.V.Karpov A.S.Kasaev V.F.Kazanin A.A.Korobov I.A.Koop A.N.Kozyrev P.P.Krokovny A.E.Kuzmenko A.S.Kuzmin I.B.Logashenko P.A.Lukin A.P.Lysenko K.Yu.Mikhailov V.S.Okhapkin E.A.Perevedentsev Yu.N.Pestov A.S.Popov G.P.Razuvaev Yu.A.Rogovsky A.A.Ruban N.M.Ryskulov A.E.Ryzhenenkov V.E.Shebalin D.N.Shemyakin B.A.Shwartz D.B.Shwartz A.L.Sibidanov Yu.M.Shatunov A.A.Talyshev A.I.Vorobiov Yu.V.Yudin
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classification hep-ex
keywords center-of-masscmd-3crossdetectorenergyprocessrangetimes
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The process $e^+e^- \to K^+K^-$ has been studied using $1.7 \times 10^6$ events from a data sample corresponding to an integrated luminosity of 5.7 pb$^{-1}$ collected with the CMD-3 detector in the center-of-mass energy range 1010--1060 MeV. The cross section measured with an about 2\% systematic uncertainty and it is used to calculate the contribution to the anomalous magnetic moment of the muon $a_{\mu}^{K^+K^-} = (19.33 \pm 0.40) \times 10^{-10}$, and to obtain the $\phi(1020)$ meson parameters. We consider the relationship between the $e^+e^- \to K^+K^-$ and $e^+e^- \to K^0_SK^0_L$ cross sections and compare it to the theoretical expectations.

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