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Measurements of branching fractions of τ lepton decays with one or more KS0

  • S. Ryu
  • , I. Adachi
  • , H. Aihara
  • , D. M. Asner
  • , V. Aulchenko
  • , T. Aushev
  • , A. M. Bakich
  • , A. Bala
  • , B. Bhuyan
  • , A. Bobrov
  • , A. Bondar
  • , G. Bonvicini
  • , A. Bozek
  • , M. Bračko
  • , T. E. Browder
  • , D. Červenkov
  • , V. Chekelian
  • , B. G. Cheon
  • , K. Chilikin
  • , R. Chistov
  • K. Cho, V. Chobanova, S. K. Choi, Y. Choi, J. Dalseno, Z. DoleŽal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, T. Iwashita, T. Julius, E. Kato, C. Kiesling, B. H. Kim, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, P. KriŽan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. J. Kwon, S. H. Lee, J. Li, J. Libby, D. Liventsev, P. Lukin, J. Macnaughton, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, M. Petrič, L. E. Piilonen, M. Ritter, M. Röhrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, O. Seon, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc
  • Seoul National University
  • High Energy Accelerator Research Organization, Tsukuba
  • The University of Tokyo
  • Pacific Northwest National Laboratory
  • Novosibirsk State University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • The University of Sydney
  • Panjab University
  • Indian Institute of Technology Guwahati
  • Wayne State University
  • H. Niewodniczanski Institute of Nuclear Physics
  • Jožef Stefan Institute
  • University of Maribor
  • University of Hawai'i at Mānoa
  • Charles University
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Hanyang University
  • Korea Institute of Science and Technology Information
  • Gyeongsang National University
  • Sungkyunkwan University
  • Technische Universität München
  • German Electron Synchrotron
  • Tata Institute of Fundamental Research
  • University of Ljubljana
  • Nagoya University
  • Nara Women's University
  • Tohoku Gakuin University
  • National Taiwan University
  • Tohoku University
  • University of Melbourne
  • Soongsil University
  • Korea University
  • Karlsruhe Institute of Technology
  • Yonsei University
  • Indian Institute of Technology Madras
  • Niigata University
  • Moscow Engineering Physics Institute
  • National Institute for Nuclear Physics
  • Osaka Metropolitan University
  • National Central University
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Kyungpook National University
  • Luther College, Decorah
  • Virginia Polytechnic Institute and State University
  • University of Pittsburgh
  • Swiss Federal Institute of Technology Lausanne
  • University of the Basque Country
  • Ikerbasque Basque Foundation for Science
  • Austrian Academy of Sciences
  • Justus Liebig University Giessen
  • Beihang University
  • Tokyo Institute of Technology
  • Institute for High Energy Physics
  • University of Nova Gorica
  • Tokyo Metropolitan University
  • University of Turin
  • National United University Taiwan
  • CAS - Institute of High Energy Physics
  • Nippon Dental University
  • University of Science and Technology of China

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

We report measurements of branching fractions of τ lepton decays to final states with a KS0 meson using a 669fb-1 data sample accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. The inclusive branching fraction is measured to be B(τ-→KS0X-ντ)=(9. 15±0.01±0.15)×10-3, where X- can be anything; the exclusive branching fractions are B(τ-→π-KS0ντ)=(4.16±0. 01±0.08)×10-3, B(τ-→K-KS0ντ)=(7.40±0. 07±0.27)×10-4, B(τ-→π-KS0π0ντ)=(1. 93±0.02±0.07)×10-3, B(τ-→K-KS0π0ντ)=(7. 48±0.10±0.37)×10-4, B(τ-→π-KS0KS0ντ)=(2. 33±0.03±0.09)×10-4, B(τ-→π-KS0KS0π0ντ) =(2.00±0.22±0.20)×10-5, where the first uncertainty is statistical and the second is systematic. For each mode, the accuracy is improved over that of pre-B-factory measurements by a factor ranging from five to ten. In τ-→π-KS0KS0π0ντ decays, clear signals for the intermediate states τ-→π-f1(1285)ντ and τ-→K*- KS0π0ντ are observed.

Original languageEnglish
Article number072009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Issue number7
DOIs
StatePublished - 9 Apr 2014

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