Abstract
Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we study the processes of \( {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} \), \( {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} \), and \( {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} \) for the first time. The relative branching ratios to the normalization mode of \( {\Xi}_c^0\to {\Xi}^{-}{\pi}^{+} \) are measured to be
where the uncertainties are statistical and systematic, respectively. We obtain
where the uncertainties are statistical, systematic, and from \( \mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right) \), respectively. The asymmetry parameters \( \alpha \left({\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0}\right) \) and \( \alpha \left({\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -}\right) \) are 0.15 ± 0.22(stat.) ± 0.04(syst.) and −0.52 ± 0.30(stat.) ± 0.02(syst.), respectively, where the uncertainties are statistical followed by systematic.
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The Belle collaboration., Jia, S., Tang, S.S. et al. Measurements of branching fractions and asymmetry parameters of \( {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} \), \( {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} \), and \( {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} \) decays at Belle. J. High Energ. Phys. 2021, 160 (2021). https://doi.org/10.1007/JHEP06(2021)160
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DOI: https://doi.org/10.1007/JHEP06(2021)160