Precise measurement of hadronic τ-decays with an η meson
Inami, K.; Ohshima, T.; Kaji, H.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bedny, I.; Bhardwaj, V.; Bondar, A.; Bračko, M.; Browder, T.E.; Chang, M.-C.; Chao, Y.; Chistov, R.; Cho, I.-S.; Choi, Y.; Dalseno, J.; Dash, M.; Eidelman, S.; Epifanov, D.; Gabyshev, N.; Golob, B.; Haba, J.; Hara, K.; Hayasaka, K.; Hayashii, H.; Heffernan, D.; Hoshi, Y.; Hou, W.-S.; Hyun, H.J.; Iijima, T.; Ishikawa, A.; Iwasaki, Y.; Kah, D.H.; Kang, J.H.; Kawasaki, T.; Kichimi, H.; Kim, H.O.; Kim, S.K.; Kim, Y.I.; Kim, Y.J.; Krokovny, P.; Kumar, R.; Kuzmin, A.; Kwon, Y.-J.; Kyeong, S.-H.; Lange, J.S.; Lee, J.S.; Lee, M.J.; Lee, S.E.; Limosani, A.; Lin, S.-W.; Louvot, R.; Mandl, F.; McOnie, S.; Medvedeva, T.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nakano, E.; Nakao, M.; Nakazawa, H.; Nitoh, O.; Noguchi, S.; Ogawa, S.; Okuno, S.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Park, C.W.; Park, H.; Park, H.K.; Park, K.S.; Peak, L.S.; Piilonen, L.E.; Poluektov, A.; Sakai, Y.; Schneider, O.; Shapkin, M.; Shebalin, V.; Shiu, J.-G.; Shwartz, B.; Singh, J.B.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Tanaka, M.; Taylor, G.N.; Teramoto, Y.; Uehara, S.; Uglov, T.; Uno, S.; Usov, Y.; Usuki, Y.; Varner, G.; Vinokurova, A.; Wang, C.H.; Wang, P.; Wang, X.L.; Watanabe, Y.; Wedd, R.; Won, E.; Yamashita, Y.; Zhang, Z.P.; Zhilich, V.; Zhulanov, V.; Zivko, T.; Zupanc, A.; Zyukova, O.
2009
Abstract
We have studied hadronic τ decay modes involving an η meson using 490 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. The following branching fractions have been measured: B (τ- → K- η ντ) = (1.58 ± 0.05 ± 0.09) × 10- 4, B (τ- → K- π0 η ντ) = (4.6 ± 1.1 ± 0.4) × 10- 5, B (τ- → π- π0 η ντ) = (1.35 ± 0.03 ± 0.07) × 10- 3, B (τ- → π- KS 0 η ντ) = (4.4 ± 0.7 ± 0.2) × 10- 5, and B (τ- → K* - η ντ) = (1.34 ± 0.12 ± 0.09) × 10- 4. These results are substantially more precise than previous measurements. The new measurements are compared with theoretical calculations based on the CVC hypothesis or the chiral perturbation theory. We also set upper limits on branching fractions for τ decays into K- KS 0 η ντ, π- KS 0 π0 η ντ, K- η η ντ, π- η η ντ and non-resonant K- π0 η ντ final states. © 2009.
Details
Title
Precise measurement of hadronic τ-decays with an η meson
Author(s)
Inami, K. ; Ohshima, T. ; Kaji, H. ; Adachi, I. ; Aihara, H. ; Arinstein, K. ; Aulchenko, V. ; Aushev, T. ; Bedny, I. ; Bhardwaj, V. ; Bondar, A. ; Bračko, M. ; Browder, T.E. ; Chang, M.-C. ; Chao, Y. ; Chistov, R. ; Cho, I.-S. ; Choi, Y. ; Dalseno, J. ; Dash, M. ; Eidelman, S. ; Epifanov, D. ; Gabyshev, N. ; Golob, B. ; Haba, J. ; Hara, K. ; Hayasaka, K. ; Hayashii, H. ; Heffernan, D. ; Hoshi, Y. ; Hou, W.-S. ; Hyun, H.J. ; Iijima, T. ; Ishikawa, A. ; Iwasaki, Y. ; Kah, D.H. ; Kang, J.H. ; Kawasaki, T. ; Kichimi, H. ; Kim, H.O. ; Kim, S.K. ; Kim, Y.I. ; Kim, Y.J. ; Krokovny, P. ; Kumar, R. ; Kuzmin, A. ; Kwon, Y.-J. ; Kyeong, S.-H. ; Lange, J.S. ; Lee, J.S. ; Lee, M.J. ; Lee, S.E. ; Limosani, A. ; Lin, S.-W. ; Louvot, R. ; Mandl, F. ; McOnie, S. ; Medvedeva, T. ; Miyabayashi, K. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Nakano, E. ; Nakao, M. ; Nakazawa, H. ; Nitoh, O. ; Noguchi, S. ; Ogawa, S. ; Okuno, S. ; Ozaki, H. ; Pakhlov, P. ; Pakhlova, G. ; Park, C.W. ; Park, H. ; Park, H.K. ; Park, K.S. ; Peak, L.S. ; Piilonen, L.E. ; Poluektov, A. ; Sakai, Y. ; Schneider, O. ; Shapkin, M. ; Shebalin, V. ; Shiu, J.-G. ; Shwartz, B. ; Singh, J.B. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Tanaka, M. ; Taylor, G.N. ; Teramoto, Y. ; Uehara, S. ; Uglov, T. ; Uno, S. ; Usov, Y. ; Usuki, Y. ; Varner, G. ; Vinokurova, A. ; Wang, C.H. ; Wang, P. ; Wang, X.L. ; Watanabe, Y. ; Wedd, R. ; Won, E. ; Yamashita, Y. ; Zhang, Z.P. ; Zhilich, V. ; Zhulanov, V. ; Zivko, T. ; Zupanc, A. ; Zyukova, O.
Published in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume
672
Issue
3
Pages
209-218
Date
2009
ISSN
03702693
Keywords
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Laboratories
LPHE
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Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LPHE - High Energy Physics Laboratory
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Work produced at EPFL
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Peer-reviewed publications
Work produced at EPFL
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Record creation date
2010-11-05