Charmed baryon decay asymmetry in e+e- annihilation

Abstract

We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as $\ldc\to\ldπ^+,Σ^0π^+,p \bar K_0$, $\hat{I}{ž}_c^0\to \hat{I}{ž}^{-}\ddot{I}{€}^{+}$ and $\hat{I}{\text{c◯}}_c^0\to \hat{I}{\text{c◯}}^{-}\ddot{I}{€}^{+}$. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in $\ee$ annihilation data. Base on the current $\ldc$ data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters $α_{\ldπ^+}$ for $\ldc\to\ldπ^+$, $\hat{I}{\pm }_{\hat{I}{\pounds }^{+}\ddot{I}{€}^0}$ for $\ldc\toΣ^+π^0$ and $α_{\usigπ^+}$ for $\ldc\to\usigπ^+$.

9 pages