Measurement of the $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^0$ cross sections from $\sqrt{s}=$ 2.000 to 3.080 GeV

Abstract

Based on $e^{+}{e}^{-}$ collision data collected at center-of-mass energies from 2.000 to 3.080 GeV by the BESIII detector at the BEPCII collider, a partial wave analysis is performed for the process $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^0$. The results allow the Born cross sections of the process $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^0$, as well as its subprocesses $e^{+}{e}^{-}\to K^{\ast }(892{)}^0{\bar{K}}^0$ and $K_2^{\ast }(1430{)}^0{\bar{K}}^0$ to be measured. The Born cross sections for $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^0$ are consistent with previous measurements by BaBar, but with substantially improved precision. The Born cross section lineshape of the process $e^{+}{e}^{-}\to K^{\ast }(892{)}^0{\bar{K}}^0$ is consistent with a vector meson state around 2.2 GeV with a significance of 3.2$\sigma$. A Breit-Wigner fit determines its mass as $M_Y=(2164.7\pm 9.1\pm 3.1)\mathrm{MeV}/c^2$ and its width as ${\Gamma }_Y=(32.4\pm 21.0\pm 1.8)\mathrm{MeV}$.

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Cited by in corpus (1)

• Algorithms for partial wave amplitudes under covariant $L$-$S$ scheme