Search for the Cabibbo-suppressed decays $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^0$ and $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$

Abstract

Utilizing 4.5 $f{b}^{-}$ of $e^{+}{e}^{-}$ annihilation data collected at center-of-mass energies ranging from 4599.53 MeV to 4698.82 MeV by the BESIII detector at the BEPCII collider, we search for the singly Cabibbo-suppressed hadronic decays $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^0$ and $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ with a single-tag method. No significant signals are observed for both decays. The upper limits on the branching fractions at the $90\%$ confidence level are determined to be $5.0\times 10^{-4}$ for $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^0$ and $6.5\times 10^{-4}$ for $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$.

12 pages, 6 figures