This analysis measures e+e− → KSKL cross sections, suggesting insights into resonance structures near 2.2 GeV.
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+π−η, and e+e− → ωππ 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 et al. (2020) studied this question.
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