Mizuk, R.Abe, K.Adachi, I.Aihara, H.Anipko, D.Aulchenko, V.Aushev, T.Bakich, A.M.Balagura, V.Barberio, E.Bay, A.Bedny, I.Belous, K.Bitenc, U.Bizjak, I.Blyth, S.Bondar, A.Bozek, A.Bračko, M.Brodzicka, J.Browder, T.E.Chang, M.-C.Chen, A.Chen, K.-F.Chen, W.T.Cheon, B.G.Chistov, R.Choi, Y.Choi, Y.K.Cole, S.Dalseno, J.Danilov, M.Drutskoy, A.Eidelman, S.Epifanov, D.Fratina, S.Gabyshev, N.Garmash, A.Gershon, T.Gokhroo, G.Golob, B.Ha, H.Haba, J.Hayasaka, K.Hayashii, H.Hazumi, M.Heffernan, D.Hokuue, T.Hoshi, Y.Hou, S.Hou, W.-S.Iijima, T.Ikado, K.Imoto, A.Inami, K.Ishikawa, A.Itoh, R.Iwasaki, M.Iwasaki, Y.Kaji, H.Kang, J.H.Kapusta, P.Katayama, N.Khan, H.R.Kichimi, H.Kim, Y.J.Kinoshita, K.Korpar, S.Križan, P.Krokovny, P.Kulasiri, R.Kumar, R.Kuo, C.C.Kuzmin, A.Kwon, Y.-J.Leder, G.Lee, J.Lee, M.J.Lee, S.E.Lesiak, T.Lin, S.-W.Liventsev, D.Majumder, G.Mandl, F.Matsumoto, T.Matyja, A.McOnie, S.Miyake, H.Miyata, H.Miyazaki, Y.Nakao, M.Natkaniec, Z.Nishida, S.Ogawa, S.Ohshima, T.Okuno, S.Onuki, Y.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, H.Park, K.S.Peak, L.S.Pestotnik, R.Piilonen, L.E.Sakai, Y.Satoyama, N.Schneider, O.Schümann, J.Seidl, R.Senyo, K.Sevior, M.E.Shapkin, M.Shibuya, H.Singh, J.B.Somov, A.Soni, N.Stanič, S.Starič, M.Stoeck, H.Suzuki, S.Y.Takasaki, F.Tamai, K.Tanaka, M.Taylor, G.N.Teramoto, Y.Tian, X.C.Tikhomirov, I.Tsuboyama, T.Tsukamoto, T.Uehara, S.Uglov, T.Ueno, K.Uno, S.Urquijo, P.Usov, Y.Varner, G.Villa, S.Wang, C.H.Watanabe, Y.Won, E.Xie, Q.L.Yabsley, B.D.Yamaguchi, A.Yamashita, Y.Yamauchi, M.Yuan, C.Z.Zhang, L.M.Zhang, Z.P.Zhilich, V.Zupanc, A.2010-11-052010-11-052010-11-05200710.1103/PhysRevLett.98.2620012-s2.0-34547292556https://infoscience.epfl.ch/handle/20.500.14299/56950WOS:000247625100013We report the results of several studies of the Λc+π+π-X final state in continuum e+e- annihilation data collected by the Belle detector. An analysis of angular distributions in Λc(2880)+→Σc(2455)0, ++π+,- decays strongly favors a Λc(2880)+ spin assignment of 52 over 32 or 12. We find evidence for Λc(2880)+→Σc(2520)0,++π+,- decay and measure the ratio of Λc(2880)+ partial widths Γ(Σc(2520)π)/Γ(Σc(2455)π)=0.225±0. 062±0.025. This value favors the Λc(2880)+ spin-parity assignment of 52+ over 52-. We also report the first observation of Λc(2940) +→Σc(2455)0,++π+,- decay and measure Λc(2880)+ and Λc(2940)+ mass and width parameters. These studies are based on a 553fb-1 data sample collected at or near the Υ(4S) resonance at the KEKB collider. © 2007 The American Physical Society.text::journal::journal article::research article