Search for lepton-flavor-violating τ decay into a lepton and an f0 (980) meson

Y. Miyazaki, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, A. Bay, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, B. G. Cheon, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. DrutskoyS. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kumar, A. Kuzmin, S. H. Kyeong, J. S. Lee, J. Li, D. Liventsev, R. Louvot, F. Mandl, S. McOnie, T. Medvedeva, H. Miyata, T. Nagamine, E. Nakano, M. Nakao, H. Nakazawa, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, S. Stanič, M. Starič, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usuki, G. Varner, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, Eunil Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

We search for lepton-flavor-violating τ decays into a lepton (electron or muon) and an f0 (980) meson using 671 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No events are observed and we set the following 90% C.L. upper limits on the branching fraction products: B (τ- → e- f0 (980)) × B (f0 (980) → π+ π-) < 3.2 × 10- 8 and B (τ- → μ- f0 (980)) × B (f0 (980) → π+ π-) < 3.4 × 10- 8. This is the first search performed for these modes.

Original languageEnglish
Pages (from-to)317-322
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume672
Issue number4-5
DOIs
Publication statusPublished - 2009 Mar 2

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Miyazaki, Y., Adachi, I., Aihara, H., Arinstein, K., Aushev, T., Bakich, A. M., Bay, A., Bedny, I., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chen, A., Cheon, B. G., Cho, I. S., Choi, Y., Dalseno, J., Dash, M., ... Zyukova, O. (2009). Search for lepton-flavor-violating τ decay into a lepton and an f0 (980) meson. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 672(4-5), 317-322. https://doi.org/10.1016/j.physletb.2009.01.058