Measurement of CP asymmetries and branching fractions in a time-dependent Dalitz analysis of B0→(ρπ)0 and a constraint on the quark mixing angle 2

A. Kusaka, C. C. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. ChenW. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, Eunil Won, Y. Yamashita, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

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Abstract

We present the results of a time-dependent Dalitz plot analysis of B0→π+π-π0 decays based on a 414fb-1 data sample that contains 449×106BB̄ pairs. The data were collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the quark mixing angle 2, 68°< 2<95° at the 68.3% confidence level for the 2 solution consistent with the standard model. A large standard-model-disfavored region also remains. The branching fractions for the decay processes B0→ρ±(770)π and B0→ρ0(770)π0 are measured to be (22.6±1.1[stat]±4.4[syst])×10-6 and (3.0±0.5[stat] ±0.7[syst])×10-6, respectively. These are the first branching fraction measurements of the process B0→ρ(770)π with the lowest resonance ρ(770) explicitly separated from the radial excitations.

Original languageEnglish
Article number072001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number7
DOIs
Publication statusPublished - 2008 Apr 3

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

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