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; 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

doi:10.1016/j.physletb.2018.01.079

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arXiv · 1710.02989

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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Abstract

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 $a_μ^{K^+K^-} = (19.33 \pm 0.40) \times 10^{-10}$, and to obtain the $ϕ(1020)$ 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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E. A. Kozyrev, E. P. Solodov, R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov, V. M. Aulchenko, V. S. Banzarov, N. S. Bashtovoy, 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. 2017-10-09. Study of the process $e^+e^- \to K^+K^-$ in the center-of-mass energy range 1010--1060~MeV with the CMD-3 detector. https://doi.org/10.1016/j.physletb.2018.01.079

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