Search for B→πℓ+ℓ- decays at Belle

J. T. Wei, K. F. Chen, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. CheonR. Chistov, I. S. Cho, Y. Choi, J. Dalseno, S. Eidelman, B. Golob, H. Hayashii, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, T. Kawasaki, H. Kichimi, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kumar, Y. J. Kwon, S. H. Kyeong, J. S. Lee, T. Lesiak, A. Limosani, S. W. Lin, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, H. Miyata, Y. Miyazaki, G. R. Moloney, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Peters, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, J. G. Shiu, J. B. Singh, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, C. C. Wang, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, J. Wicht, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

We present a search for the decays B+→π+ℓ+ℓ- and B0→π0ℓ+ℓ-, where ℓ+ℓ- is either a μ+μ- or e+e- pair, with a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. Signal events are reconstructed from a charged or a neutral pion candidate and a pair of oppositely charged electrons or muons. No significant signal is observed and we set an upper limit on the isospin-averaged branching fraction B(B→πℓ+ℓ-)<6.2×10-8 at the 90% confidence level.

Original languageEnglish
Article number011101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume78
Issue number1
DOIs
Publication statusPublished - 2008 Jul 7

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Wei, J. T., Chen, K. F., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., Bakich, A. M., Balagura, V., Belous, K., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chao, Y., Chen, A., Chen, W. T., ... Zyukova, O. (2008). Search for B→πℓ+ℓ- decays at Belle. Physical Review D - Particles, Fields, Gravitation and Cosmology, 78(1), [011101]. https://doi.org/10.1103/PhysRevD.78.011101