Search for neutrinoless decays τ→3ℓ

Y. Yusa, T. Nagamine, A. Yamaguchi, K. Abe, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, E. Banas, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. BozekM. Bračko, T. E. Browder, M. C. Chang, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, M. Danilov, L. Y. Dong, S. Eidelman, V. Eiges, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, J. MacNaughton, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, H. Miyata, D. Mohapatra, G. R. Moloney, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, K. S. Park, N. Parslow, J. P. Perroud, L. E. Piilonen, A. Poluektov, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, O. Schneider, A. J. Schwartz, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, N. Soni, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, Y. Yamada, Y. Yamashita, M. Yamauchi, H. Yanai, J. Zhang, Z. P. Zhang, V. Zhilich, T. Ziegler, D. Žontar

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Abstract

We have searched for neutrinoless τ lepton decays into three charged leptons using an 87.1fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. Since the number of signal candidate events is compatible with that expected from the background, we set 90% confidence level upper limits on the branching fractions in the range (1.9-3.5)×10-7 for various decay modes τ -→ℓ-+- where ℓ represents e or μ.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume589
Issue number3-4
DOIs
StatePublished - 2004 Jun 10

Keywords

  • 11.30.Hv
  • 13.35.Dx
  • 14.60.Fg
  • TAU lepton flavor violation

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    Yusa, Y., Nagamine, T., Yamaguchi, A., Abe, K., Abe, K., Abe, T., Adachi, I., Aihara, H., Akatsu, M., Asano, Y., Aulchenko, V., Aushev, T., Bahinipati, S., Bakich, A. M., Banas, E., Bedny, I., Bitenc, U., Bizjak, I., Bondar, A., ... Žontar, D. (2004). Search for neutrinoless decays τ→3ℓ. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 589(3-4), 103-110. https://doi.org/10.1016/j.physletb.2004.04.002