Search for charmed baryons in the Λ+cη system and measurement of the branching fractions of Λc(2880)+ and Λc(2940)+ decaying to Λ+cη and pD0 relative to Σc(2455)⁢π

S.  x., Li; 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.; Q.  p., Ji; 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.; L.  k., Li; Li, Y.; Y.  b., Li; 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.; Pedlar, T.  k.; 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.; Null, Null

doi:10.1103/physrevd.110.032021

We search for excited charmed baryons in the Λ+cη system using a data sample corresponding to an integrated luminosity of 980 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 Λ+cη mass spectrum, including the known Λc(2880)+ and Λc(2940)+. Clear Λc(2880)+ and Λc(2940)+ signals are observed in the pD0 mass spectrum. We set upper limits at 90% credibility level on ratios of branching fractions of Λc(2880)+ and Λc(2940)+ decaying to Λ+cη relative to Σc(2455)⁢π of <0.13 for the Λc(2880)+ and <1.11 for the Λc(2940)+. We measure ratios of branching fractions of Λc(2880)+ and Λc(2940)+ decaying to pD0 relative to Σc(2455)⁢π of 0.75±0.03⁢(stat)±0.07⁢(syst) for the Λc(2880)+ and 3.59±0.21⁢(stat)±0.56⁢(syst) for the Λc(2940)+.