Observation of the decay $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^0$

Abstract

We report the first observation of the decay $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^0$, based on data obtained in $e^{+}{e}^{-}$ annihilations with an integrated luminosity of 567~pb${}^{-1}$ at $\sqrt{s}=4.6$~GeV. The data were collected with the BESIII detector at the BEPCII storage rings. The absolute branching fraction $\mathcal{B}(\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^0)$ is determined to be $(2.11\pm 0.33(stat.)\pm 0.14(syst.))\%$. In addition, an improved measurement of $\mathcal{B}(\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+})$ is determined as $(1.81\pm 0.17(stat.)\pm 0.09(syst.))\%$.

8 pages, 1 figure