Search for the weak decay $\psi (3686)\to {\Lambda }_c^{+}{\bar{\Sigma }}^{-}+c.c$

Abstract

Using $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector, we perform the first search for the weak baryonic decay $\psi (3686)\to {\Lambda }_c^{+}{\bar{\Sigma }}^{-}+c.c.$. The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction ($\mathcal{B}$) of $\psi (3686)\to {\Lambda }_c^{+}{\bar{\Sigma }}^{-}+c.c.$ is set to be $1.4\times 10^{-5}$ at the 90\% confidence level.

arXiv comment9 pages, 4 figures

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