Search for B0→ℓ+- at the Belle detector

M. C. Chang, P. Chang, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. ChaoK. F. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, L. Y. Dong, S. Eidelman, V. Eiges, C. Fukunaga, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, T. Hara, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov

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Abstract

We report the results of a search for the decay B0→e +e-, μ+μ- and e ±μ based on an analysis of 78 fb -1 of data collected by the Belle detector at KEKB. No candidate events have been found. Upper limits on the branching fractions are calculated at the 90% confidence level: B(B0→e+e -)<1.9×10-7, B(B0 →μ +μ-)<1.6×10-7, and B(B 0→e±μ)<1. 7×10-7. A limit on the Pati-Salam leptoquark mass M LQ46 TeV/c2 is obtained at the 90% confidence level.

Original languageEnglish (US)
Article number111101
JournalPhysical Review D
Volume68
Issue number11
DOIs
StatePublished - 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Chang, M. C., Chang, P., Abe, K., Abe, T., Adachi, I., Aihara, H., Akatsu, M., Asano, Y., Aso, T., Aulchenko, V., Aushev, T., Bakich, A. M., Bedny, I., Bizjak, I., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., ... Pakhlov, P. (2003). Search for B0→ℓ+- at the Belle detector. Physical Review D, 68(11), [111101]. https://doi.org/10.1103/PhysRevD.68.111101