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  • Search for rare decays \(B^{+} \to D_{s}^{(\ast)+}\eta\), \(D_{s}^{(\ast)+}\bar{K}^{0}\), \(D^{+}\eta\), and \(D^{+}K^{0}\)
    Kumar, M; Lalwani, K; Asner, D M; Behera, P; Belous, K; Bennett, J; Bessner, M; Bilka, T; Bobrov, A; Bodrov, D; Bozek, A; M -C Chang; Cheon, B G; Cho, H E; Cho, K; S -J Cho; Choi, Y; Das, S; Dash, N; De Pietro, G; Dingfelder, J; Doležal, Z; Dong, T V; Dossett, D; Ferlewicz, D; Garg, R; Garmash, A; Gudkova, K; Hadjivasiliou, C; Hara, T; Hayasaka, K; Hayashii, H; W -S Hou; C -L Hsu; Iijima, T; Ishikawa, A; Iwasaki, M; Ji, Q P; Jia, S; Jin, Y; Joo, K K; Kim, D Y; Y -K Kim; Korobov, A; Križan, P; Kumar, R; Kumara, K; Y -J Kwon; Laurenza, M; J Li; Y Li; L Li Gioi; Libby, J; Lieret, K; Liventsev, D; Masuda, M; Matvienko, D; Meier, F; Mizuk, R; Nayak, L; Nishida, S; Pakhlova, G; Pardi, S; Park, H; Passeri, A; Pedlar, T K; Pestotnik, R; Piilonen, L E; Prencipe, E; Prim, M T; Rout, N; Schwanda, C; Seino, Y; Senyo, K; Sevior, M E; Sharma, C; Shen, C P; Solovieva, E; Stottler, Z S; Sumihama, M; Takizawa, M; Tanida, K; Tenchini, F; Uno, S; R van Tonder; Varner, G; Vinokurova, A; M -Z Wang; Wang, X L; Watanabe, M; Watanuki, S; Werbycka, O; Yabsley, B D; Yan, W; Yin, J H; Yuan, C Z; Yusa, Y; Zhai, Y; Zhilich, V; Zhukova, V

    arXiv.org, 01/2023
    Paper

    We present a study of rare decay modes \(B^{+} \to D_{s}^{+}h^{0}\), \(B^{+} \to D_{s}^{\ast+}h^{0}\), and \(B^{+} \to D^{+}h^{0}\), where \(h^{0}\) denotes the neutral mesons \(\eta\) or \(K^{0}\), using a data sample of \((772 \pm 10 ) \times 10^{6}\) \(B\bar{B}\) events produced at the \(\Upsilon(4S)\) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We observe no evidence for these decays, so we provide upper limits at the 90\(\%\) confidence level on the branching fractions of \(B^{+} \to D_{s}^{+}h^{0}\), \(D_{s}^{\ast+}h^{0}\), and \(D^{+}h^{0}\) decay modes. Along with rare decay modes, we report improved measurements of the color-suppressed decay branching fractions \(\mathcal{B}(\bar{B}^{0} \to D^{0}\eta)\) = (26.6 \(\pm\) 1.2 \(\pm\) 2.1) \(\times\) \(10^{-5}\) and \(\mathcal{B}(\bar{B}^{0} \to D^{0}\bar{K}^{0})\) = (5.6 \(\pm\) 0.5 \(\pm\) 0.2) \(\times\) \(10^{-5}\). The first and second uncertainties are statistical and systematic, respectively.

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