Cross sections for the reactions $e^{+}{e}^{-}\to K_S^0{K}_L^0$, $K_S^0{K}_L^0{\pi }^{+}{\pi }^{-}$, $K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}$, and $K_S^0{K}_S^0{K}^{+}{K}^{-}$ from events with initial-state radiation

Abstract

We study the processes $e^{+}{e}^{-}\to K_S^0{K}_L^0\gamma$, $K_S^0{K}_L^0{\pi }^{+}{\pi }^{-}\gamma$, $K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}\gamma$, and $K_S^0{K}_S^0{K}^{+}{K}^{-}\gamma$, where the photon is radiated from the initial state, providing cross section measurements for the hadronic states over a continuum of center-of-mass energies. The results are based on 469 fb${}^{-1}$ of data collected with the BaBar detector at SLAC. We observe the $\varphi (1020)$ resonance in the $K_S^0{K}_L^0$ final state and measure the product of its electronic width and branching fraction with about 3% uncertainty. We present a measurement of the $e^{+}{e}^{-}\to K_S^0{K}_L^0$ cross section in the energy range from 1.06 to 2.2 GeV and observe the production of a resonance at 1.67 GeV. We present the first measurements of the $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^{+}{\pi }^{-}$, $K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}$, and $K_S^0{K}_S^0{K}^{+}{K}^{-}$ cross sections, and study the intermediate resonance structures. We obtain the first observations of \jpsi decay to the $K_S^0{K}_L^0{\pi }^{+}{\pi }^{-}$, $K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}$, and $K_S^0{K}_S^0{K}^{+}{K}^{-}$ final states.

28 pages, 42 figures

References in corpus (1)

• Measurement of $\varphi$(1020) meson leptonic width with CMD-2 detector at VEPP-2M Collider

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