Abstract
Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we study for the first time the singly Cabibbo-suppressed decays \( {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} \) and Ω−K+ and the doubly Cabibbo-suppressed decay \( {\Omega}_c^0\to {\Xi}^{-}{K}^{+} \). Evidence for an \( {\Omega}_c^0 \) signal in the \( {\Omega}_c^0 \) → Ξ−π+ mode is reported with a significance of 4.5σ including systematic uncertainties. The ratio of branching fractions to the normalization mode \( {\Omega}_c^0 \) → Ω−π+ is measured to be
No significant signals of \( {\Omega}_c^0\to {\Xi}^{-}{K}^{+} \) and Ω−K+ modes are found. The upper limits at 90% confidence level on ratios of branching fractions are determined to be
and
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The Belle collaboration., Han, X., Jia, S. et al. Evidence for the singly Cabibbo-suppressed decay \( {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} \) and search for \( {\Omega}_c^0\to {\Xi}^{-}{K}^{+} \) and Ω−K+ decays at Belle. J. High Energ. Phys. 2023, 55 (2023). https://doi.org/10.1007/JHEP01(2023)055
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DOI: https://doi.org/10.1007/JHEP01(2023)055