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  • Search for charmed baryons in the $\Lambda_c^+\eta$ system and measurement of the branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $\Lambda_c^+\eta$ and $pD^0$ relative to $\Sigma_c(2455)\pi
    Li, S. X; Ahn, J. K; Aihara, H; Asner, D. M; Aushev, T; Ayad, R; Banerjee, Sw; Belous, K; Bessner, M; Bilka, T; Bodrov, D; Bozek, A; Bračko, M; Branchini, P; Browder, T. E; Campajola, M; Chang, M. -C; Cheon, B. G; Chilikin, K; Cho, K; Choi, S. -K; Choi, Y; Choudhury, S; De Pietro, G; Dhamija, R; Dingfelder, J; Doležal, Z; Dong, T. V; Dubey, S; Ferber, T; Fulsom, B. G; Gaur, V; Garmash, A; Goldenzweig, P; Graziani, E; Grube, B; Guan, Y; Gudkova, K; Hadjivasiliou, C; Hsu, C. -L; Itoh, R; Iwasaki, M; Jacobs, W. W; Jia, S; Jin, Y; Joo, K. K; Kiesling, C; Kim, D. Y; Kim, Y. J; Kinoshita, K; Kodyš, P; Korobov, A; Križan, P; Krokovny, P; Kuhr, T; Kumar, R; Kwon, Y. -J; Li, L. K; Li, Y; Li, Y. B; Masuda, M; Maurya, S. K; Meier, F; Merola, M; Miyabayashi, K; Mizuk, R; Mussa, R; Nakao, M; Natochii, A; Nayak, M; Nishida, S; Pakhlova, G; Pardi, S; Park, J; Park, S. -H; Pedlar, T. K; Pestotnik, R; Piilonen, L. E; Podobnik, T; Prencipe, E; Prim, M. T; Russo, G; Savinov, V; Schnell, G; Seino, Y; Senyo, K; Shiu, J. -G; Solovieva, E; Starič, M; Sumihama, M; Takizawa, M; Tamponi, U; Tanida, K; Tenchini, F; Uglov, T; Uno, S; Yan, W; Yelton, J; Yuan, L; Zhilich, V

    arXiv (Cornell University), 06/2024
    Journal Article

    We search for excited charmed baryons in the $\Lambda_c^+\eta$ system using a data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. No significant signals are found in the $\Lambda_c^+\eta$ mass spectrum, including the known $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$. Clear $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ signals are observed in the $pD^0$ mass spectrum. We set upper limits at 90\% credibility level on ratios of branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $\Lambda_c^+\eta$ relative to $\Sigma_c(2455)\pi$ of $<0.13$ for the $\Lambda_c(2880)^+$ and $<1.11$ for the $\Lambda_c(2940)^+$. We measure ratios of branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $pD^0$ relative to $\Sigma_c(2455)\pi$ of $0.75 \pm 0.03(\text{stat.}) \pm 0.07(\text{syst.})$ for the $\Lambda_c(2880)^+$ and $3.59 \pm 0.21(\text{stat.}) \pm 0.56(\text{syst.})$ for the $\Lambda_c(2940)^+$.

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