Measurement of the absolute branching fraction of the singly Cabibbo suppressed decay $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$

Abstract

The singly Cabibbo suppressed decay $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ is measured using 4.5 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. Evidence for $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ with a statistical significance of $3.6\ddot{I}ƒ$ is reported with a double-tag approach. The $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ absolute branching fraction is determined to be $(5.62_{-2.04}^{+2.46}\pm 0.26)\times 10^{-4}$, where the first and second uncertainties are statistical and systematic, respectively. Our result is consistent with the branching fraction obtained by the Belle collaboration within the uncertainty of $1\ddot{I}ƒ$.

10 pages, 5 figures