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

• Received 17 June 2022
• Accepted 28 July 2022

DOI:https://doi.org/10.1103/PhysRevD.107.032005

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society