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

Miyazaki, Y. ; Adachi, I. ; Aihara, H. ; Anipko, D. ; Arinstein, K. ; Aulchenko, V. ; Aziz, T. ; Bakich, A.M. ; Barberio, E. ; Bay, A. ; Bedny, I. ; Belous, K. ; Bitenc, U. ; Bizjak, I. ; Bondar, A. ; Bračko, M. ; Browder, T.E. ; Chen, A. ; Chen, W.T. ; Cheon, B.G. ; Choi, Y. ; Choi, Y.K. ; Dalseno, J. ; Eidelman, S. ; Epifanov, D. ; Fratina, S. ; Gabyshev, N. ; Go, A. ; Gorišek, A. ; Ha, H. ; Haba, J. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Heffernan, D. ; Hokuue, T. ; Hoshi, Y. ; Hou, S. ; Hou, W.-S. ; Iijima, T. ; Imoto, A. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Kaji, H. ; Kapusta, P. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kim, Y.J. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kulasiri, R. ; Kumar, R. ; Kuo, C.C. ; Kuzmin, A. ; Kwon, Y.-J. ; Lee, M.J. ; Lesiak, T. ; Lin, S.-W. ; Mandl, F. ; Matsumoto, T. ; Miyake, H. ; Miyata, H. ; Nagamine, T. ; Nagasaka, Y. ; Nakao, M. ; Nishida, S. ; Nitoh, O. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Onuki, Y. ; Ozaki, H. ; Pakhlov, P. ; Pakhlova, G. ; Park, H. ; Peak, L.S. ; Pestotnik, R. ; Piilonen, L.E. ; Poluektov, A. ; Sahoo, H. ; Sakai, Y. ; Satoyama, N. ; Schietinger, T. ; Schneider, O. ; Schümann, J. ; Schwanda, C. ; Schwartz, A.J. ; Senyo, K. ; Sevior, M.E. ; Shibuya, H. ; Shwartz, B. ; Sidorov, V. ; Singh, J.B. ; Somov, A. ; Soni, N. ; Stanič, S. ; Starič, M. ; Stoeck, H. ; Sumiyoshi, T. ; Takasaki, F. ; Tamai, K. ; Tanaka, M. ; Taylor, G.N. ; Teramoto, Y. ; Tian, X.C. ; Tikhomirov, I. ; Tsukamoto, T. ; Uehara, S. ; Ueno, K. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Varner, G. ; Villa, S. ; Vinokurova, A. ; Wang, C.H. ; Watanabe, M. ; Watanabe, Y. ; Won, E. ; Yamaguchi, A. ; Yamashita, Y. ; Yamauchi, M. ; Zhang, Z.P. ; Zhilich, V. ; Zhulanov, V. ; Zupanc, A.

We have searched for lepton-flavor-violating τ decays with a pseudoscalar meson (η, η′ and π0) using a data sample of 401 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is found and we set the following upper limits on the branching fractions: B (τ- → e- η) < 9.2 × 10-8, B (τ- → μ- η) < 6.5 × 10-8, B (τ- → e- η′) < 1.6 × 10-7, B (τ- → μ- η′) < 1.3 × 10-7, B (τ- → e- π0) < 8.0 × 10-8 and B (τ- → μ- π0) < 1.2 × 10-7 at the 90% confidence level. These results improve our previously published upper limits by factors from 2.3 to 6.3. © 2007 Elsevier B.V. All rights reserved.


Published in:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 648, 5-6, 341-350
Year:
2007
ISSN:
03702693
Other identifiers:
Scopus: 2-s2.0-34247338959
View record in Web of Science
Laboratories:




 Record created 2010-11-05, last modified 2018-12-03


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