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Using the initial-state radiation method, the e+e → KSKL cross section from 1.98 to 2.54 GeV is measured in a data sample of 469 fb−1 collected with the BABAR detector. The results are used in conjunction with previous BABAR results for the e+e→ K+K, e+e → π+π, e+e → π+πη, and e+eωππ cross sections to investigate the nature of the resonance structure recently observed by the BESIII experiment in the e+e → K+K cross section.

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Lees, J. P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. N., Kolomensky, Yu. G., Fritsch, M., Koch, H., Schroeder, T., Cheaib, R., Hearty, C., Mattison, T. S., McKenna, J. A., So, R. Y., Blinov, V. E., Buzykaev, A. R., Druzhinin, V. P., … Wu, S. L. (2020a). Resonances in . Physical Review D, 101(1).

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