Kyeong, S.-H.Kwon, Y.-J.Adachi, I.Aihara, H.Bakich, A.M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bischofberger, M.Bozek, A.Bračko, M.Browder, T.E.Chang, M.-C.Chao, Y.Chen, A.Cheon, B.G.Chiang, C.-C.Cho, I.-S.Choi, Y.Dalseno, J.Das, A.Drutskoy, A.Dungel, W.Eidelman, S.Gabyshev, N.Goldenzweig, P.Ha, H.Haba, J.Han, B.-Y.Hara, T.Hasegawa, Y.Hayasaka, K.Hayashii, H.Hoshi, Y.Hyun, H.J.Inami, K.Ishikawa, A.Itoh, R.Iwasaki, M.Joshi, N.J.Kah, D.H.Kang, J.H.Kapusta, P.Katayama, N.Kawasaki, T.Kim, H.O.Kim, J.H.Kim, Y.I.Kim, Y.J.Kinoshita, K.Ko, B.R.Korpar, S.Križan, P.Kumar, R.Lee, M.J.Lesiak, T.Li, J.Liu, C.Liu, Y.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Nagasaka, Y.Nakano, E.Nakao, M.Natkaniec, Z.Nishida, S.Nishimura, K.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, C.W.Park, H.Park, H.K.Pestotnik, R.Piilonen, L.E.Sahoo, H.Sakai, K.Sakai, Y.Schneider, O.Schümann, J.Schwanda, C.Schwartz, A.J.Sekiya, A.Senyo, K.Sevior, M.E.Shapkin, M.Shen, C.P.Shiu, J.-G.Shwartz, B.Singh, J.B.Sinha, R.Sokolov, A.Stanič, S.Starič, M.Stypula, J.Sumisawa, K.Sumiyoshi, T.Taylor, G.N.Teramoto, Y.Trabelsi, K.Uehara, S.Unno, Y.Urquijo, P.Varner, G.Varvell, K.E.Vervink, K.Vinokurova, A.Wang, C.H.Wang, M.-Z.Wang, P.Watanabe, Y.Wedd, R.Won, E.Yabsley, B.D.Yamashita, Y.Zhang, Z.P.Zhilich, V.Zhulanov, V.Zivko, T.Zupanc, A.Zyukova, O.2010-11-052010-11-052010-11-05200910.1103/PhysRevD.80.0511032-s2.0-70349779598https://infoscience.epfl.ch/handle/20.500.14299/56850WOS:000270384900003We report measurements of charmless hadronic B0 decays into the π+π-K+π- final state. The analysis uses a sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the resonance. The decay B0→ρ0K+π- is observed for the first time; the significance is 5.0σ and the corresponding partial branching fraction for MKπ(0.75,1.20)GeV/c2 is [2.8±0.5(stat) ±0.5(syst)]×10-6. We also obtain the first evidence for B0→f0(980)K+π- with 3.5σ significance and for B0→π+π- K*0 with 4.5σ significance. For the two-body decays B0→ρ0K*0 and B0→f0(980)K*0, the significances are 2.7σ and 2.5σ, respectively, and the upper limits on the branching fractions are 3.4×10-6 and 2.2×10-6 at 90% confidence level. © 2009 The American Physical Society.Cp-ViolationBellePolarizationDetectorPhysicstext::journal::journal article::research article