Measurement of the branching fractions and the invariant mass distributions for τ-→h-h+h-ντ decays

M. J. Lee, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, I. S. ChoY. Choi, J. Dalseno, A. Das, W. Dungel, S. Eidelman, D. Epifanov, M. Fujikawa, N. Gabyshev, A. Garmash, H. Ha, J. Haba, B. Y. Han, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, N. Katayama, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, S. H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, F. Mandl, S. McOnie, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

We present a study of τ-→π -π+π-ντ, τ -→K-π+π-ντ, τ-→K-K+π-ντ, and τ-→K-K+K-ντ decays using a 666fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at and near a center-of-mass energy of 10.58 GeV. The branching fractions are measured to be B(τ-→π-π+π -ντ)=(8.42±0.00-0.25+0.26)×10-2, B(τ-→K-π+π-ντ) =(3.30±0.01-0.17+0.16)×10-3, B(τ -→K-K+π-ντ)=(1. 55±0.01-0.05+0.06)×10-3, and B(τ -→K-K+K-ντ)=(3. 29±0.17-0.20+0.19)×10-5, where the first uncertainty is statistical and the second is systematic. These branching fractions do not include contributions from modes in which a π+π- pair originates from a KS0 decay. We also present the unfolded invariant mass distributions for these decays.

Original languageEnglish
Article number113007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number11
DOIs
Publication statusPublished - 2010 Jun 21

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Lee, M. J., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., Bakich, A. M., Barberio, E., Bay, A., Belous, K., Bhardwaj, V., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chen, A., Chen, P., Cheon, B. G., ... Zyukova, O. (2010). Measurement of the branching fractions and the invariant mass distributions for τ-→h-h+h-ντ decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 81(11), [113007]. https://doi.org/10.1103/PhysRevD.81.113007