Abstract
We present a study of the decay τ- → KS π- ντ using a 351 fb-1 data sample collected with the Belle detector. The analysis is based on 53, 110 lepton-tagged signal events. The measured branching fraction B (τ- → KS π- ντ) = (0.404 ± 0.002 (stat .) ± 0.013 (syst .)) % is consistent with the world average value and has better accuracy. An analysis of the KS π- invariant mass spectrum reveals contributions from the K* (892)- as well as other states. For the first time the K* (892)- mass and width have been measured in τ decay: M (K* (892)-) = (895.47 ± 0.20 (stat .) ± 0.44 (syst .) ± 0.59 (mod .)) MeV / c2, Γ (K* (892)-) = (46.2 ± 0.6 (stat .) ± 1.0 (syst .) ± 0.7 (mod .)) MeV. The K* (892)- mass is significantly different from the current world average value.
Original language | English (US) |
---|---|
Pages (from-to) | 65-73 |
Number of pages | 9 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 654 |
Issue number | 3-4 |
DOIs | |
State | Published - Oct 11 2007 |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Keywords
- K
- Tau
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Study of τ- → KS π- ντ decay at Belle. / Epifanov, D.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Balagura, V.; Barberio, E.; Bedny, I.; Belous, K.; Bitenc, U.; Bizjak, I.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chao, Y.; Chen, A.; Chen, K. F.; Chen, W. T.; Cheon, B. G.; Chiang, C. C.; Chistov, R.; Cho, I. S.; Choi, Y.; Choi, Y. K.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Gokhroo, G.; Golob, B.; Ha, H.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hokuue, T.; Hoshi, Y.; Hou, W. S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Ikado, K.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kah, D. H.; Kaji, H.; Kang, J. H.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. O.; Kim, S. K.; Kim, Y. J.; Križan, P.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y. J.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S. W.; Liu, Y.; Liventsev, D.; Mandl, F.; Marlow, D.; Matsumoto, T.; Matyja, A.; McOnie, S.; Medvedeva, T.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Moloney, G. R.; Mori, T.; Nakano, E.; Nakao, M.; Nakazawa, H.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Onuki, Y.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Palka, H.; Park, C. W.; Park, H.; Park, K. S.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Sahoo, H.; Sakai, Y.; Schneider, O.; Seidl, R.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shibuya, H.; Shwartz, B.; Sokolov, A.; Somov, A.; Soni, N.; Stanič, S.; Starič, M.; Stoeck, H.; Sumiyoshi, T.; Takasaki, F.; Tamai, K.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Tikhomirov, I.; Tsuboyama, T.; Uehara, S.; Ueno, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vervink, K.; Villa, S.; Vinokurova, A.; Wang, C. H.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B. D.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 654, No. 3-4, 11.10.2007, p. 65-73.Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Study of τ- → KS π- ντ decay at Belle
AU - Epifanov, D.
AU - Adachi, I.
AU - Aihara, H.
AU - Arinstein, K.
AU - Aulchenko, V.
AU - Aushev, T.
AU - Bakich, A. M.
AU - Balagura, V.
AU - Barberio, E.
AU - Bedny, I.
AU - Belous, K.
AU - Bitenc, U.
AU - Bizjak, I.
AU - Bondar, A.
AU - Bozek, A.
AU - Bračko, M.
AU - Browder, T. E.
AU - Chao, Y.
AU - Chen, A.
AU - Chen, K. F.
AU - Chen, W. T.
AU - Cheon, B. G.
AU - Chiang, C. C.
AU - Chistov, R.
AU - Cho, I. S.
AU - Choi, Y.
AU - Choi, Y. K.
AU - Dalseno, J.
AU - Dash, M.
AU - Drutskoy, A.
AU - Eidelman, S.
AU - Gokhroo, G.
AU - Golob, B.
AU - Ha, H.
AU - Haba, J.
AU - Hayasaka, K.
AU - Hayashii, H.
AU - Hazumi, M.
AU - Heffernan, D.
AU - Hokuue, T.
AU - Hoshi, Y.
AU - Hou, W. S.
AU - Hsiung, Y. B.
AU - Hyun, H. J.
AU - Iijima, T.
AU - Ikado, K.
AU - Inami, K.
AU - Ishikawa, A.
AU - Itoh, R.
AU - Iwasaki, M.
AU - Iwasaki, Y.
AU - Kah, D. H.
AU - Kaji, H.
AU - Kang, J. H.
AU - Kawai, H.
AU - Kawasaki, T.
AU - Kichimi, H.
AU - Kim, H. O.
AU - Kim, S. K.
AU - Kim, Y. J.
AU - Križan, P.
AU - Krokovny, P.
AU - Kumar, R.
AU - Kuo, C. C.
AU - Kuzmin, A.
AU - Kwon, Y. J.
AU - Lee, J. S.
AU - Lee, M. J.
AU - Lee, S. E.
AU - Lesiak, T.
AU - Li, J.
AU - Limosani, A.
AU - Lin, S. W.
AU - Liu, Y.
AU - Liventsev, D.
AU - Mandl, F.
AU - Marlow, D.
AU - Matsumoto, T.
AU - Matyja, A.
AU - McOnie, S.
AU - Medvedeva, T.
AU - Miyata, H.
AU - Miyazaki, Y.
AU - Mizuk, R.
AU - Moloney, G. R.
AU - Mori, T.
AU - Nakano, E.
AU - Nakao, M.
AU - Nakazawa, H.
AU - Natkaniec, Z.
AU - Nishida, S.
AU - Nitoh, O.
AU - Ogawa, S.
AU - Ohshima, T.
AU - Onuki, Y.
AU - Ostrowicz, W.
AU - Ozaki, H.
AU - Pakhlov, P.
AU - Pakhlova, G.
AU - Palka, H.
AU - Park, C. W.
AU - Park, H.
AU - Park, K. S.
AU - Peak, L. S.
AU - Pestotnik, R.
AU - Piilonen, L. E.
AU - Poluektov, A.
AU - Sahoo, H.
AU - Sakai, Y.
AU - Schneider, O.
AU - Seidl, R.
AU - Senyo, K.
AU - Sevior, M. E.
AU - Shapkin, M.
AU - Shibuya, H.
AU - Shwartz, B.
AU - Sokolov, A.
AU - Somov, A.
AU - Soni, N.
AU - Stanič, S.
AU - Starič, M.
AU - Stoeck, H.
AU - Sumiyoshi, T.
AU - Takasaki, F.
AU - Tamai, K.
AU - Tanaka, M.
AU - Taylor, G. N.
AU - Teramoto, Y.
AU - Tian, X. C.
AU - Tikhomirov, I.
AU - Tsuboyama, T.
AU - Uehara, S.
AU - Ueno, K.
AU - Uglov, T.
AU - Unno, Y.
AU - Uno, S.
AU - Urquijo, P.
AU - Usov, Y.
AU - Varner, G.
AU - Vervink, K.
AU - Villa, S.
AU - Vinokurova, A.
AU - Wang, C. H.
AU - Wang, P.
AU - Watanabe, Y.
AU - Wedd, R.
AU - Won, E.
AU - Yabsley, B. D.
AU - Yamaguchi, A.
AU - Yamashita, Y.
AU - Yamauchi, M.
AU - Yuan, C. Z.
AU - Zhang, Z. P.
AU - Zhilich, V.
AU - Zupanc, A.
N1 - Funding Information: We are grateful to M. Jamin for interesting discussions. We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the National Institute of Informatics for valuable computing and Super-SINET network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and the Japan Society for the Promotion of Science; the Australian Research Council and the Australian Department of Education, Science and Training; the National Science Foundation of China and the Knowledge Innovation Program of the Chinese Academy of Sciences under contract No. 10575109 and IHEP-U-503; the Department of Science and Technology of India; the BK21 program of the Ministry of Education of Korea, the CHEP SRC program and Basic Research program (grant No. R01-2005-000-10089-0) of the Korea Science and Engineering Foundation, and the Pure Basic Research Group program of the Korea Research Foundation; the Polish State Committee for Scientific Research; the Ministry of Education and Science of the Russian Federation and the Russian Federal Agency for Atomic Energy; the Slovenian Research Agency; the Swiss National Science Foundation; the National Science Council and the Ministry of Education of Taiwan; and the US Department of Energy.
PY - 2007/10/11
Y1 - 2007/10/11
N2 - We present a study of the decay τ- → KS π- ντ using a 351 fb-1 data sample collected with the Belle detector. The analysis is based on 53, 110 lepton-tagged signal events. The measured branching fraction B (τ- → KS π- ντ) = (0.404 ± 0.002 (stat .) ± 0.013 (syst .)) % is consistent with the world average value and has better accuracy. An analysis of the KS π- invariant mass spectrum reveals contributions from the K* (892)- as well as other states. For the first time the K* (892)- mass and width have been measured in τ decay: M (K* (892)-) = (895.47 ± 0.20 (stat .) ± 0.44 (syst .) ± 0.59 (mod .)) MeV / c2, Γ (K* (892)-) = (46.2 ± 0.6 (stat .) ± 1.0 (syst .) ± 0.7 (mod .)) MeV. The K* (892)- mass is significantly different from the current world average value.
AB - We present a study of the decay τ- → KS π- ντ using a 351 fb-1 data sample collected with the Belle detector. The analysis is based on 53, 110 lepton-tagged signal events. The measured branching fraction B (τ- → KS π- ντ) = (0.404 ± 0.002 (stat .) ± 0.013 (syst .)) % is consistent with the world average value and has better accuracy. An analysis of the KS π- invariant mass spectrum reveals contributions from the K* (892)- as well as other states. For the first time the K* (892)- mass and width have been measured in τ decay: M (K* (892)-) = (895.47 ± 0.20 (stat .) ± 0.44 (syst .) ± 0.59 (mod .)) MeV / c2, Γ (K* (892)-) = (46.2 ± 0.6 (stat .) ± 1.0 (syst .) ± 0.7 (mod .)) MeV. The K* (892)- mass is significantly different from the current world average value.
KW - K
KW - Tau
UR - http://www.scopus.com/inward/record.url?scp=34548859533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548859533&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2007.08.045
DO - 10.1016/j.physletb.2007.08.045
M3 - Article
AN - SCOPUS:34548859533
VL - 654
SP - 65
EP - 73
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -