arxiv: 1808.08733 · v3 · ★pith:RHXMB75Gnew · submitted 2018-08-27 · ✦ hep-ex
Precision measurements of σ_(B)(e^+e^- to K_(S)⁰K^(pm)π^(mp)) at center-of-mass energies between 3.8 and 4.6 GeV
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Using data samples collected by the BESIII detector operating at the BEPCII storage ring, we measure the $e^+e^- \to K_{S}^{0}K^{\pm}\pi^{\mp}$ Born cross sections at center-of-mass energies between 3.8 and 4.6\,GeV, corresponding to a luminosity of about 5.0~fb$^{-1}$. The results are compatible with the BABAR measurements, but with the precision significantly improved. A simple $1/s^n$ dependence for the continuum process can describe the measured cross sections, but a better fit is obtained by an additional resonance near 4.2\,GeV, which could be an excited charmonium or a charmonium-like state.
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