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Y Li; Tang, S S; Jia, S; Adachi, I; S Al Said; Atmacan, H; Aulchenko, V; Aushev, T; Bahinipati, S; Behera, P; Bessner, M; Bozek, A; M -C Chang; Chen, A; Chilikin, K; Cho, K; S -J Cho; Choi, Y; Cunliffe, S; Dash, N; De Pietro, G; F Di Capua; Doležal, Z; Dong, T V; Ferber, T; Garg, R; Golob, B; Gudkova, K; Halder, S; Hayashii, H; Iwasaki, M; Jacobs, W W; E -J Jang; Joo, K K; Kang, K H; Kim, D Y; Kodyš, P; Korobov, A; Korpar, S; Križan, P; Kroeger, R; Krokovny, P; Kuhr, T; Kumar, M; Y -J Kwon; Lalwani, K; Laurenza, M; Lee, S C; Li, C H; Li, L K; L Li Gioi; Lieret, K; Liventsev, D; Masuda, M; McNeil, J T; Mizuk, R; Mohanty, G B; Mussa, R; Nakao, M; Natochii, A; Nayak, L; Nayak, M; Niiyama, M; Nishimura, K; Pakhlova, G; Pardi, S; Passeri, A; Pestotnik, R; Podobnik, T; Popov, V; Prencipe, E; Prim, M T; Sakai, Y; Savinov, V; Schwanda, C; Seino, Y; Sharma, C; Shebalin, V; Solovieva, E; Stottler, Z S; Sumihama, M; Sutcliffe, W; Takizawa, M; Tenchini, F; Uchida, M; Unno, Y; Uno, S; Usov, Y; Vinokurova, A; Wang, C H; Wang, E; Watanuki, S; Werbycka, O; Yabsley, B D; Yan, W; H Ye; Yuan, C Z; Zhang, Z P; Zhilich, V; Zhukova, V
arXiv.org, 06/2021Paper
Using a data sample of 980~fb\(^{-1}\) collected with the Belle detector operating at the KEKB asymmetric-energy \(e^+e^-\) collider, we present evidence for the \(\Omega(2012)^-\) in the resonant substructure of \(\Omega_{c}^{0} \to \pi^+ (\bar{K}\Xi)^{-}\) (\((\bar{K}\Xi)^{-}\) = \(K^-\Xi^0\) + \(\bar{K}^0 \Xi^-\)) decays. The significance of the \(\Omega(2012)^-\) signal is 4.2\(\sigma\) after considering the systematic uncertainties. The ratio of the branching fraction of \(\Omega_{c}^{0} \to \pi^{+} \Omega(2012)^- \to \pi^+ (\bar{K}\Xi)^{-}\) relative to that of \(\Omega_{c}^{0} \to \pi^{+} \Omega^-\) is calculated to be 0.220 \(\pm\) 0.059(stat.) \(\pm\) 0.035(syst.). The individual ratios of the branching fractions of the two isospin modes are also determined, and found to be \({\cal B}(\Omega_{c}^0 \to \pi^+ \Omega(2012)^-) \times {\cal B}(\Omega(2012)^- \to K^-\Xi^0)/{\cal B}(\Omega_{c}^0 \to \pi^+ K^- \Xi^0)\) = (9.6 \(\pm\) 3.2(stat.) \(\pm\) 1.8(syst.))\% and \({\cal B}(\Omega_{c}^0 \to \pi^+ \Omega(2012)^-) \times {\cal B}(\Omega(2012)^- \to \bar{K}^0 \Xi^-)/{\cal B}(\Omega_{c}^0 \to \pi^+ \bar{K}^0 \Xi^-)\) = (5.5 \(\pm\) 2.8(stat.) \(\pm\) 0.7(syst.))\%.
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