Measurement of the branching fraction of ${\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-}$ at Belle

Abstract

Based on a data sample of 983 fb${}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present the study of the heavy-flavor-conserving decay ${\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-}$ with ${\Lambda }_c^{+}$ reconstructed via its $p{K}^{-}{\pi }^{+}$ decay mode. The branching fraction ratio $\mathcal{B}({\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-})/\mathcal{B}({\Xi }_c^0\to {\Xi }^{-}{\pi }^{+})$ is measured to be $0.38\pm 0.04\pm 0.04$. Combing with the world average value of $\mathcal{B}({\Xi }_c^0\to {\Xi }^{-}{\pi }^{+})$, the branching fraction $\mathcal{B}({\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-})$ is deduced to be $(0.54\pm 0.05\pm 0.05\pm 0.12)\%$. Here, the uncertainties above are statistical, systematic, and from $\mathcal{B}({\Xi }_c^0\to {\Xi }^{-}{\pi }^{+})$, respectively.

5 pages, 4 figures

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• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
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• Revisiting heavy-flavor conserving weak decays of charmed baryons within the nonrelativistic quark model