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

S. X. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, Sw Banerjee, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, D. Bodrov, A. Bozek, M. Bračko, P. Branchini, T. E. BrowderA. Budano, M. Campajola, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, P. Ecker, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, P. Goldenzweig, E. Graziani, B. Grube, Y. Guan, K. Gudkova, C. Hadjivasiliou, C. L. Hsu, N. Ipsita, R. Itoh, M. Iwasaki, W. W. Jacobs, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, C. Kiesling, D. Y. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, Y. J. Kwon, L. K. Li, Y. Li, Y. B. Li, D. Liventsev, M. Masuda, S. K. Maurya, F. Meier, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, T. Nakano, M. Nakao, A. Natochii, M. Nayak, S. Nishida, P. Pakhlov, G. Pakhlova, S. Pardi, J. Park, S. H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, G. Russo, S. Sandilya, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, J. G. Shiu, E. Solovieva, M. Starič, M. Sumihama, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, S. Uno, E. Wang, E. Won, B. D. Yabsley, W. Yan, J. Yelton, J. H. Yin, L. Yuan, V. Zhilich

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Abstract

We search for excited charmed baryons in the Λc+η 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 Λc+η 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 Λc+η 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)+.

Original languageEnglish
Article number032021
JournalPhysical Review D
Volume110
Issue number3
DOIs
StatePublished - 1 Aug 2024

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