Search for lepton flavor violating decays τ- → ℓ- π0, ℓ- η, ℓ- η′

Y. Enari, N. Sato, K. Abe, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, S. Bahinipati, A. M. Baakich, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, M. C. Chang, Y. Chao, A. ChenW. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, L. S. Peak, L. E. Piilonen, N. Root, H. Sagawa, Y. Sakai, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, K. Senyo, M. E. Sevior, T. Shibata, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. Watanabe, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar

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Abstract

We have searched for lepton flavor violating semileptonic τ- decays using a data sample of 153.8 fb-1 accumulated with the Belle detector at the KEKB e+e- collider. For the six decay modes studied, the observed yield is compatible with the estimated background and the following upper limits are set at the 90% confidence level: B(τ-→e-η)<2.3×10-7, B(τ-→μ-η)<1.5×10-7, B(τ-→e-π0)<1.9×10-7, B(τ-→μ-π0)<4.1×10-7, B(τ-→e-η′) <10×10-7, and B(τ-→μ-η′)<4.7×10-7. These results are 10 to 64 times more restrictive than previous limits.

Original languageEnglish
Pages (from-to)218-228
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume622
Issue number3-4
DOIs
Publication statusPublished - 2005 Sep 1

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Enari, Y., Sato, N., Abe, K., Abe, K., Aihara, H., Asano, Y., Aulchenko, V., Bahinipati, S., Baakich, A. M., Bedny, I., Bitenc, U., Bizjak, I., Blyth, S., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Chang, M. C., Chao, Y., ... Žontar, D. (2005). Search for lepton flavor violating decays τ- → ℓ- π0, ℓ- η, ℓ- η′. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 622(3-4), 218-228. https://doi.org/10.1016/j.physletb.2005.07.021