Measurement of the $e^+e^- \to K^+K^-Ï^+Ï^-$ cross section with the CMD-3 detector at the VEPP-2000 collider
arXiv:1510.00654 · doi:10.1016/j.physletb.2016.02.072
Abstract
The process $e^+e^- \to K^+K^-Ï^+Ï^-$ has been studied in the center-of-mass energy range from 1500 to 2000\,MeV using a data sample of 23 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. Using about 24000 selected events, the $e^+e^- \to K^+K^-Ï^+Ï^-$ cross section has been measured with a systematic uncertainty decreasing from 11.7\% at 1500-1600\,MeV to 6.1\% above 1800\,MeV. A preliminary study of $K^+K^-Ï^+Ï^-$ production dynamics has been performed.