Measurements of the branching fractions of $\ddot{I}{‡}_{cJ}\to 2K^{+}2K^{-}\ddot{I}‰$ and $\ddot{I}•K^{+}{K}^{-}\ddot{I}‰$ decays

Abstract

Using a data sample of $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, we report the first observation of the decays $\ddot{I}{‡}_{cJ}\to 2K^{+}2K^{-}\ddot{I}‰$ and $\ddot{I}{‡}_{cJ}\to \ddot{I}•K^{+}{K}^{-}\ddot{I}‰$ ($J=0,1,2$) via the radiative transitions $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{‡}_{cJ}$. The branching fractions of these decays are measured for the first time, and the statistical significance for each signal exceeds $10\ddot{I}ƒ$.

11 pages, 3 figures, 3 tables