학술논문
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 $\Sigma_c(2455)\pi$
Document Type
Working Paper
Author
Belle Collaboration; Li, S. X.; Shen, C. P.; Adachi, I.; Ahn, J. K.; Aihara, H.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Banerjee, Sw.; Belous, K.; Bennett, J.; Bessner, M.; Bilka, T.; Biswas, D.; Bodrov, D.; Bozek, A.; Bračko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Dash, N.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Dingfelder, J.; Doležal, Z.; Dong, T. V.; Dubey, S.; Ecker, P.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Goldenzweig, P.; Graziani, E.; Grube, B.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Hsu, C. -L.; Ipsita, N.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Ji, Q. P.; Jia, S.; Jin, Y.; Joo, K. K.; Kiesling, C.; Kim, D. Y.; Kim, Y. J.; Kinoshita, K.; Kodyš, P.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kwon, Y. -J.; Li, L. K.; Li, Y.; Li, Y. B.; Liventsev, D.; Masuda, M.; Maurya, S. K.; Meier, F.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mussa, R.; Nakano, T.; Nakao, M.; Natochii, A.; Nayak, M.; Nishida, S.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, J.; Park, S. -H.; Patra, S.; Paul, S.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Russo, G.; Sandilya, S.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Shiu, J. -G.; Solovieva, E.; Starič, M.; Sumihama, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Uchida, M.; Uglov, T.; Uno, S.; Wang, E.; Won, E.; Yabsley, B. D.; Yan, W.; Yelton, J.; Yin, J. H.; Yuan, L.; Zhilich, V.
Source
Subject
Language
Abstract
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 $\Lambda_c(2940)^+$.
Comment: 10 pages, 4 figures
Comment: 10 pages, 4 figures