Measurement of the branching fraction for B → η′ K and search for B → η′π+

K. Abe, K. Abe, R. Abe, I. Adachi, B. S. Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, A. M. Bakich, E. Banas, S. Behari, P. K. Behera, D. Beiline, A. Bondar, A. Bozek, T. E. Browder, B. C.K. Casey, P. ChangY. Chao, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, L. Y. Dong, J. Dragic, S. Eidelman, Y. Enari, F. Fang, H. Fujii, C. Fukunaga, M. Fukushima, N. Gabyshev, A. Garmash, T. Gershon, A. Gordon, K. Gotow, R. Guo, J. Haba, H. Hamasaki, K. Hara, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, H. Hirano, T. Hojo, Y. Hoshi, K. Hoshina, S. R. Hou, W. S. Hou, S. C. Hsu, H. C. Huang, Y. Igarashi, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, G. Iwai, H. Iwasaki, Y. Iwasaki, D. J. Jackson, P. Jalocha, H. K. Jang, J. Kaneko, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. Kim, H. J. Kim, H. Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Kobayashi, H. Konishi, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. H. Lee, D. Liventsev, R. S. Lu, T. Matsubara, S. Matsumoto, T. Matsumoto, J. MacNaughton, Y. Mikami, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, S. Mori, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, S. Narita, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, H. Ozaki, P. Pakhlov, H. Palka, C. S. Park, C. W. Park, H. Park, L. S. Peak, M. Peters, L. E. Piilonen, E. Prebys, J. L. Rodriguez, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, S. Stanic, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, Y. Tanaka, Y. Teramoto, M. Tomoto, T. Tomura, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M. Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, Y. Yamashita, M. Yamauchi, S. Yanaka, J. Yashima, K. Yoshida, Y. Yusa, H. Yuta, C. C. Zhang, J. Zhang, H. W. Zhao, Y. Zheng, V. Zhilich, D. Zontar

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Abstract

We report measurements for two-body charmless hadronic B decays with an η′ meson in the final state. Using 11.1 × 106 BB̄ pairs collected with the Belle detector, we find BF(B+ → η′K+) = (79+12-11 ± 9) × 10-6 and BF(B0 → η′ K0) = (55+19-16 ± 8) × 10-6, where the first and second errors are statistical and systematic, respectively. No signal is observed in the mode B+ → η′+, and we set a 90% confidence level upper limit of BF(B+ η′π+) < 7 × 10-6. The CP asymmetry in B± → η′K± decays is investigated and a limit at 90% confidence level of -0.20 < ACP < 0.32 is obtained.

Original languageEnglish
Pages (from-to)309-318
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume517
Issue number3-4
DOIs
Publication statusPublished - 2001 Oct 4

Bibliographical note

Funding Information:
We wish to thank the KEK accelerator group for excellent operations. We acknowledge support from the Ministry of Education, Culture, Sports, Science and Technology of Japan and the Japan Society for the Promotion of Science; the Australian Research Council and the Australian Department of Industry, Science and Resources; the Department of Science and Technology of India; the BK21 program of the Ministry of Education of Korea and the Center for High Energy Physics sponsored by the KOSEF; the Polish State Committee for Scientific Research under contract No. 2P03B 17017; the Ministry of Science and Technology of Russian Federation; the National Science Council and the Ministry of Education of Taiwan; the Japan–Taiwan Cooperative Program of the Interchange Association; and the US Department of Energy.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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