Ma, Y.Yelton, J.Tanida, K.Adachi, I.Ahn, J. K.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aushev, T.Ayad, R.Babu, V.Bahinipati, S.Banerjee, SwBehera, P.Belous, K.Bennett, J.Bessner, M.Bhuyan, B.Bilka, T.Biswas, D.Bobrov, A.Bodrov, D.Borah, J.Bozek, A.Bracko, M.Branchini, P.Browder, T. E.Budano, A.Campajola, M.Cervenkov, D.Chang, M. -C.Chen, A.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Cho, S. -J.Choi, S. -K.Choi, Y.Choudhury, S.Cinabro, D.Das, S.De Nardo, G.De Pietro, G.Dhamija, R.Di Capua, F.Dingfelder, J.Dolezal, Z.Dong, T.Epifanov, D.Ferber, T.Ferlewicz, D.Fulsom, B. G.Garg, R.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Golob, B.Graziani, E.Gudkova, K.Hadjivasiliou, C.Halder, S.Hayasaka, K.Hayashii, H.Hedges, M. T.Hou, W. -S.Hsu, C. -L.Inami, K.Ipsita, N.Ishikawa, A.Itoh, R.Iwasaki, M.Jacobs, W. W.Jang, E. -J.Jia, S.Jin, Y.Kaliyar, A. B.Kang, K. H.Kawasaki, T.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, Y. -K.Kinoshita, K.Kodys, P.Korobov, A.Korpar, S.Kovalenko, E.Krizan, P.Krokovny, P.Kumar, R.Kumara, K.Kwon, Y. -J.Lam, T.Lange, J. S.Lee, S. C.Lewis, P.Li, L. K.Li, Y.Li Gioi, L.Libby, J.Lieret, K.Lin, Y. -R.Liventsev, D.Luo, T.Masuda, M.Matsuda, T.Matvienko, D.Maurya, S. K.Meier, F.Merola, M.Metzner, F.Miyabayashi, K.Mohanty, G. B.Mussa, R.Nakamura, I.Nakano, T.Nakao, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Oskin, P.Pakhlov, P.Pakhlova, G.Pardi, S.Park, H.Park, J.Patra, S.Paul, S.Pestotnik, R.Piilonen, L. E.Podobnik, T.Prencipe, E.Prim, M. T.Rostomyan, A.Rout, N.Russo, G.Sandilya, S.Santelj, L.Savinov, V.Schnell, G.Schueler, J.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shan, W.Shapkin, M.Sharma, C.Shen, C. P.Shiu, J. -G.Simon, F.Sokolov, A.Solovieva, E.Staric, M.Sumihama, M.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tamponi, U.Tenchini, F.Uchida, M.Uehara, S.Uglov, T.Unno, Y.Uno, K.Uno, S.Urquijo, P.Usov, Y.Vahsen, S. E.van Tonder, R.Varner, G.Vinokurova, A.Vossen, A.Wang, D.Wang, M. -Z.Watanabe, M.Watanuki, S.Werbycka, O.Won, E.Xu, X.Yabsley, B. D.Yan, W.Yang, S. B.Yin, J. H.Yuan, C. Z.Yuan, L.Zhang, Z. P.Zhilich, V.Zhukova, V.2023-12-082023-12-082023-04-122023-04-120031-9007https://hdl.handle.net/10919/117128Using the data sample of 980 fb-1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we present the results of an investigation of the Λπ+ and Λπ- invariant mass distributions looking for substructure in the decay Λc+→Λπ+π+π-. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ+ (Λπ-) combination a mass of 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], an intrinsic width of 11.5±2.8(stat)±5.3(syst) MeV/c2 [33.0±7.5(stat)±23.6(syst) MeV/c2] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K̄N threshold, we also investigate the possibility of a K̄N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.6 page(s)PrintenIn CopyrightScience & TechnologyPhysical SciencesPhysics, MultidisciplinaryPhysicsNUCLEON INTERACTIONSLAMBDA(1405)Belle Collaboration5106 Nuclear and Plasma Physics5107 Particle and High Energy Physics51 Physical Sciences40 Engineering49 Mathematical sciencesArticle - Refereedhttps://doi.org/10.1103/PhysRevLett.130.15190313015Piilonen, Leo [0000-0001-6836-0748]371158801079-7114