Measurement of the branching fractions of the singly Cabibbo-suppressed decays $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ and $\hat{I}{›}_c^{+}\to p\ddot{I}‰$

Abstract

Based on 4.5 $\mbox{fb$^{-1}$}$ $e^{+}{e}^{-}$ collision data collected with BESIII detector at seven energy points between 4.600 and 4.699 GeV, the branching fractions for $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ and $\hat{I}{›}_c^{+}\to p\ddot{I}‰$ were measured by means of single-tag method. The branching fractions of $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ and $\hat{I}{›}_c^{+}\to p\ddot{I}‰$ are determined to be $(1.57\pm 0.11_{\mathrm{stat}}\pm 0.04_{\mathrm{syst}})\times 10^{-3}$ and $(1.11\pm 0.20_{\mathrm{stat}}\pm 0.07_{\mathrm{syst}})\times 10^{-3}$, with a statistical significance of greater than 10 $\ddot{I}ƒ$ and 5.7 $\ddot{I}ƒ$, respectively. These results are consistent with the previous measurements by BESIII, LHCb and Belle, and the result of $\hat{I}{›}_c^{+}\to p\hat{I}\cdot$ is the most precise to date.

24 pages, 4 figures