Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons

Y. Miyazaki, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, M. Bračko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, I. S. Cho, Y. ChoiJ. Dalseno, M. Dash, W. Dungel, S. Eidelman, D. Epifanov, M. Feindt, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, J. Haba, K. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, R. Kumar, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, S. H. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, V. Shebalin, J. G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

We search for lepton flavor and lepton number violating τ decays into a lepton (ℓ = electron or muon) and two charged mesons (h, h = π± or K±), τ- → ℓ- h+ h′ - and τ- → ℓ+ h- h′ -, using 671 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. We obtain 90% C.L. upper limits on the branching fractions in the range (4.4 - 8.8) × 10- 8 for τ → e h h, and (3.3 - 16) × 10- 8 for τ → μ h h processes. These results improve upon previously published upper limits by factors between 1.6 to 8.8.

Original languageEnglish
Pages (from-to)355-362
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume682
Issue number4-5
DOIs
StatePublished - 2010 Jan 4

Fingerprint Dive into the research topics of 'Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons'. Together they form a unique fingerprint.

  • Cite this

    Miyazaki, Y., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Belous, K., Bhardwaj, V., Bischofberger, M., Bondar, A., Bračko, M., Browder, T. E., Chang, P., Chen, A., Cheon, B. G., Cho, I. S., ... Zyukova, O. (2010). Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 682(4-5), 355-362. https://doi.org/10.1016/j.physletb.2009.11.061