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

• Main Authors: Kozyrev, E. A, Solodov, E. P, Akhmetshin, R. R, Amirkhanov, A. N, Anisenkov, A. V, Aulchenko, V. M, Banzarov, V. S, Bashtovoy, N. S, Berkaev, D. E, Bondar, A. E, Bragin, A. V, Eidelman, S. I, Epifanov, D. A, Epshteyn, L. B, Erofeev, A. L, Fedotovich, G. V, Gayazov, S. E, Grebenuk, A. A, Gribanov, S. S, Grigoriev, D. N, Ignatov, F. V, Ivanov, V. L, Karpov, S. V, Kasaev, A. S, Kazanin, V. F, Korobov, A. A, Koop, I. A, Kozyrev, A. N, Krokovny, P. P, Kuzmenko, A. E, Kuzmin, A. S, Logashenko, I. B, Lukin, P. A, Lysenko, A. P, Mikhailov, K. Yu, Okhapkin, V. S, Perevedentsev, E. A, Pestov, Yu. N, Popov, A. S, Razuvaev, G. P, Rogovsky, Yu. A, Ruban, A. A, Ryskulov, N. M, Ryzhenenkov, A. E, Shebalin, V. E, Shemyakin, D. N, Shwartz, B. A, Shwartz, D. B, Sibidanov, A. L, Shatunov, Yu. M, Talyshev, A. A, Vorobiov, A. I, Yudin, Yu. V
• Format: Journal Article
• Language: English
• Published: 09.10.2017
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.1710.02989

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.