Li, L. K.Shan, W.Kinoshita, K.Adachi, I.Aihara, H.Asner, D. M.Atmacan, H.Aushev, T.Babu, V.Bahinipati, S.Banerjee, SwBehera, P.Bennett, J.Bessner, M.Bhardwaj, V.Bhuyan, B.Bilka, T.Bobrov, A.Bodrov, D.Borah, J.Bracko, M.Branchini, P.Budano, A.Campajola, M.Cervenkov, D.Chang, M. -C.Chang, P.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Cho, S. -J.Choi, S. -K.Choi, Y.Choudhury, S.Cinabro, D.Dash, N.De Nardo, G.De Pietro, G.Dhamija, R.Di Capua, F.Dolezal, Z.V. Dong, T.Epifanov, D.Ferber, T.Frey, A.Fulsom, B. G.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Gong, G.Graziani, E.Gu, T.Guan, Y.Gudkova, K.Hadjivasiliou, C.Hayasaka, K.Hayashii, H.Hedges, M. T.Hou, W. -S.Hsu, C. -L.Inami, K.Ishikawa, A.Itoh, R.Jacobs, W. W.Jang, E. -J.Ji, Q. P.Jia, S.Jin, Y.Joo, K. K.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, K. -H.Kodys, P.Konno, T.Korobov, A.Korpar, S.Kovalenko, E.Krokovny, P.Kuhr, T.Kumar, R.Kumara, K.Kuzmin, A.Kwon, Y. -J.Lai, Y. -T.Lam, T.Lange, J. S.Lee, S. C.Li, J.Li, S. X.Li, Y.Li, Y. B.Li Gioi, L.Libby, J.Lieret, K.Masuda, M.Maurya, S. K.Merola, M.Metzner, F.Miyabayashi, K.Mizuk, R.Mussa, R.Nakao, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Niiyama, M.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Oskin, P.Pakhlova, G.Pardi, S.Park, H.Park, S. -H.Passeri, A.Patra, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, Leo E.Podobnik, T.Prencipe, E.Prim, M. T.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sakai, Y.Sandilya, S.Sangal, A.Savinov, V.Schnell, G.Schueler, J.Schwanda, C.Schwartz, A. J.Seino, Y.Senyo, K.Sevior, M. E.Shapkin, M.Sharma, C.Shen, C. P.Shiu, J. -G.Singh, J. B.Sokolov, A.Solovieva, E.Staric, M.Sumihama, M.Sumisawa, K.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tamponi, U.Tanida, K.Tenchini, F.Uchida, M.Uglov, T.Unno, Y.Uno, S.Usov, Y.Vahsen, S. E.van Tonder, R.Varner, G.Vinokurova, A.Vossen, A.Waheed, E.Wang, E.Wang, X. L.Watanabe, M.Watanuki, S.Werbycka, O.Won, E.Xu, X.Yabsley, B. D.Yan, W.Yang, S. B.Yelton, J.Yin, J. H.Yook, Y.Yuan, C. Z.Zhang, Z. P.Zhilich, V.Zhukova, V.2023-12-082023-12-082023-03-302023-02-212095-9273S2095-9273(23)00115-9 (PII)https://hdl.handle.net/10919/117126We report a study of Λc+→Λh+ and Λc+→Σ0h+ (h=K,π) decays based on a data sample of 980fb-1 collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. The first results of direct CP asymmetry in two-body singly Cabibbo-suppressed (SCS) decays of charmed baryons are measured, ACPdir(Λc+→ΛK+)=+0.021±0.026±0.001 and ACPdir(Λc+→Σ0K+)=+0.025±0.054±0.004. We also make the most precise measurement of the decay asymmetry parameters (α) for the four modes of interest and search for CP violation via the α-induced CP asymmetry (ACPα). We measure ACPα(Λc+→ΛK+)=-0.023±0.086±0.071 and ACPα(Λc+→Σ0K+)=+0.08±0.35±0.14, which are the first ACPα results for SCS decays of charmed baryons. We search for Λ-hyperon CP violation in Λc+→(Λ,Σ0)π+ and find ACPα(Λ→pπ-)=+0.013±0.007±0.011. This is the first time that hyperon CP violation has been measured via Cabibbo-favored charm decays. No evidence of baryon CP violation is found. We also obtain the most precise branching fractions for two SCS Λc+ decays, B(Λc+→ΛK+)=(6.57±0.17±0.11±0.35)×10-4 and B(Λc+→Σ0K+)=(3.58±0.19±0.06±0.19)×10-4. The first uncertainties are statistical and the second systematic, while the third uncertainties come from the uncertainties on the world average branching fractions of Λc+→(Λ,Σ0)π+.Pages 583-59210 page(s)Print-ElectronicenIn CopyrightScience & TechnologyMultidisciplinary SciencesScience & Technology - Other TopicsCP violationCharmed baryonSingly Cabibbo-suppressed decayBranching fractionDecay asymmetry parameterCP asymmetryHYPERON DECAYSSU(3) PREDICTIONSBARYON ASYMMETRYQUARK-MODELIDENTIFICATIONBelle Collaborationasymmetryviolation5106 Nuclear and Plasma Physics5107 Particle and High Energy Physics4902 Mathematical Physics49 Mathematical Sciences51 Physical SciencesArticle - Refereedhttps://doi.org/10.1016/j.scib.2023.02.017686Piilonen, Leo [0000-0001-6836-0748]368943852095-9281