Speaker
Mr
Dong Liu
(USTC)
Description
The cross section of the $e^+e^-\to K^+K^-$ process is measured with data samples collected with Beijing Spectrometer (BESIII) at $\sqrt{s} = 2.00 - 3.08$ GeV. The results are consistent with those of BaBar and with better precision. A structure near $2.2$ GeV is observed with mass $2229.8 \pm 5.3_{stat} \pm 17.2_{syst}$ MeV and width $143.7 \pm 12.0_{stat} \pm 7.8_{syst}$ MeV. The kaon form factor is extracted from $\sigma(e^+e^-\to K^+K^-)$ and compared with theoretical prediction.
Primary author
Mr
Dong Liu
(USTC)
