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

• Published in: arXiv.org
• 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, K Yu Mikhailov, 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: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 09.10.2017
• Subjects: Center of mass; Cross-sections; Luminosity; Magnetic moments
• ISSN: 2331-8422
• 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.