Search for charmed baryons in the $Λ_c^+η$ system and measurement of the branching fractions of $Λ_c(2880)^+$ and $Λ_c(2940)^+$ decaying to $Λ_c^+η$ and $pD^0$ relative to $Σ_c(2455)π$
Creators: name: Belle Collaboration
name: Li, S. X.
name: Shen, C. P.
name: Adachi, I.
name: Ahn, J. K.
name: Aihara, H.
name: Asner, D. M.
name: Atmacan, H.
name: Aushev, T.
name: Ayad, R.
name: Banerjee, Sw.
name: Belous, K.
name: Bennett, J.
name: Bessner, M.
name: Bilka, T.
name: Biswas, D.
name: Bodrov, D.
name: Bozek, A.
name: Bračko, M.
name: Branchini, P.
name: Browder, T. E.
name: Budano, A.
name: Campajola, M.
name: Chang, M. -C.
name: Cheon, B. G.
name: Chilikin, K.
name: Cho, H. E.
name: Cho, K.
name: Choi, S. -K.
name: Choi, Y.
name: Choudhury, S.
name: Dash, N.
name: De Nardo, G.
name: De Pietro, G.
name: Dhamija, R.
name: Dingfelder, J.
name: Doležal, Z.
name: Dong, T. V.
name: Dubey, S.
name: Ecker, P.
name: Ferber, T.
name: Fulsom, B. G.
name: Gaur, V.
name: Garmash, A.
name: Goldenzweig, P.
name: Graziani, E.
name: Grube, B.
name: Guan, Y.
name: Gudkova, K.
name: Hadjivasiliou, C.
name: Hsu, C. -L.
name: Ipsita, N.
name: Itoh, R.
name: Iwasaki, M.
name: Jacobs, W. W.
name: Ji, Q. P.
name: Jia, S.
name: Jin, Y.
name: Joo, K. K.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, Y. J.
name: Kinoshita, K.
name: Kodyš, P.
name: Korobov, A.
name: Korpar, S.
name: Kovalenko, E.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumar, R.
name: Kumara, K.
name: Kwon, Y. -J.
name: Li, L. K.
name: Li, Y.
name: Li, Y. B.
name: Liventsev, D.
name: Masuda, M.
name: Maurya, S. K.
name: Meier, F.
name: Merola, M.
name: Miyabayashi, K.
name: Mizuk, R.
name: Mussa, R.
name: Nakano, T.
name: Nakao, M.
name: Natochii, A.
name: Nayak, M.
name: Nishida, S.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pardi, S.
name: Park, J.
name: Park, S. -H.
name: Patra, S.
name: Paul, S.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Piilonen, L. E.
name: Podobnik, T.
name: Prencipe, E.
name: Prim, M. T.
name: Russo, G.
name: Sandilya, S.
name: Savinov, V.
name: Schnell, G.
name: Schwanda, C.
name: Seino, Y.
name: Senyo, K.
name: Shiu, J. -G.
name: Solovieva, E.
name: Starič, M.
name: Sumihama, M.
name: Takizawa, M.
name: Tamponi, U.
name: Tanida, K.
name: Tenchini, F.
name: Uchida, M.
name: Uglov, T.
name: Uno, S.
name: Wang, E.
name: Won, E.
name: Yabsley, B. D.
name: Yan, W.
name: Yelton, J.
name: Yin, J. H.
name: Yuan, L.
name: Zhilich, V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We search for excited charmed baryons in the $Λ_c^+η$ 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 $Λ_c^+η$ mass spectrum, including the known $Λ_c(2880)^+$ and $Λ_c(2940)^+$. Clear $Λ_c(2880)^+$ and $Λ_c(2940)^+$ signals are observed in the $pD^0$ mass spectrum. We set upper limits at 90\% credibility level on ratios of branching fractions of $Λ_c(2880)^+$ and $Λ_c(2940)^+$ decaying to $Λ_c^+η$ relative to $Σ_c(2455)π$ of $&lt;0.13$ for the $Λ_c(2880)^+$ and $&lt;1.11$ for the $Λ_c(2940)^+$. We measure ratios of branching fractions of $Λ_c(2880)^+$ and $Λ_c(2940)^+$ decaying to $pD^0$ relative to $Σ_c(2455)π$ of $0.75 \pm 0.03(\text{stat.}) \pm 0.07(\text{syst.})$ for the $Λ_c(2880)^+$ and $3.59 \pm 0.21(\text{stat.}) \pm 0.56(\text{syst.})$ for the $Λ_c(2940)^+$.
description: 10 pages, 4 figures, accepted for publication as a Regular Article in Physical Review D