Study of τ- → KS π- ντ decay at Belle

D. Epifanov; I. Adachi; H. Aihara; K. Arinstein; V. Aulchenko; T. Aushev; A. M. Bakich; V. Balagura; E. Barberio; I. Bedny; K. Belous; U. Bitenc; I. Bizjak; A. Bondar; A. Bozek; M. Bračko; T. E. Browder; Y. Chao; A. Chen; K. F. Chen; W. T. Chen; B. G. Cheon; C. C. Chiang; R. Chistov; I. S. Cho; Y. Choi; Y. K. Choi; J. Dalseno; M. Dash; A. Drutskoy; S. Eidelman; G. Gokhroo; B. Golob; H. Ha; J. Haba; K. Hayasaka; H. Hayashii; M. Hazumi; D. Heffernan; T. Hokuue; Y. Hoshi; W. S. Hou; Y. B. Hsiung; H. J. Hyun; T. Iijima; K. Ikado; K. Inami; A. Ishikawa; R. Itoh; M. Iwasaki; Y. Iwasaki; D. H. Kah; H. Kaji; J. H. Kang; H. Kawai; T. Kawasaki; H. Kichimi; H. O. Kim; S. K. Kim; Y. J. Kim; P. Križan; P. Krokovny; R. Kumar; C. C. Kuo; A. Kuzmin; Y. J. Kwon; J. S. Lee; M. J. Lee; S. E. Lee; T. Lesiak; J. Li; A. Limosani; S. W. Lin; Y. Liu; D. Liventsev; F. Mandl; D. Marlow; T. Matsumoto; A. Matyja; S. McOnie; T. Medvedeva; H. Miyata; Y. Miyazaki; R. Mizuk; G. R. Moloney; T. Mori; E. Nakano; M. Nakao; H. Nakazawa; Z. Natkaniec; S. Nishida; O. Nitoh; S. Ogawa; T. Ohshima; Y. Onuki; W. Ostrowicz; H. Ozaki; P. Pakhlov; G. Pakhlova; H. Palka; C. W. Park; H. Park; K. S. Park; L. S. Peak; R. Pestotnik; L. E. Piilonen; A. Poluektov; H. Sahoo; Y. Sakai; O. Schneider; R. Seidl; K. Senyo; M. E. Sevior; M. Shapkin; H. Shibuya; B. Shwartz; A. Sokolov; A. Somov; N. Soni; S. Stanič; M. Starič; H. Stoeck; T. Sumiyoshi; F. Takasaki; K. Tamai; M. Tanaka; G. N. Taylor; Y. Teramoto; X. C. Tian; I. Tikhomirov; T. Tsuboyama; S. Uehara; K. Ueno; T. Uglov; Y. Unno; S. Uno; P. Urquijo; Y. Usov; G. Varner; K. Vervink; S. Villa; A. Vinokurova; C. H. Wang; P. Wang; Y. Watanabe; R. Wedd; E. Won; B. D. Yabsley; A. Yamaguchi; Y. Yamashita; M. Yamauchi; C. Z. Yuan; Z. P. Zhang; V. Zhilich; A. Zupanc

doi:10.1016/j.physletb.2007.08.045

Study of τ^- → K_S π^- ν_τ decay at Belle

D. Epifanov^*
, I. Adachi
, H. Aihara
, K. Arinstein
, V. Aulchenko
, T. Aushev
, A. M. Bakich
, V. Balagura
, E. Barberio
, I. Bedny
, K. Belous
, U. Bitenc
, I. Bizjak
, A. Bondar
, A. Bozek
, M. Bračko
, T. E. Browder
, Y. Chao
, A. Chen
, K. F. Chen

W. T. Chen, B. G. Cheon, C. C. Chiang, R. Chistov, I. S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

157 Citations (Scopus)

Abstract

We present a study of the decay τ^- → K_S π^- ν_τ 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^- → K_S π^- ν_τ) = (0.404 ± 0.002 (stat .) ± 0.013 (syst .)) % is consistent with the world average value and has better accuracy. An analysis of the K_S 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
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	https://doi.org/10.1016/j.physletb.2007.08.045
Publication status	Published - 2007 Oct 11

Bibliographical note

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.

Keywords

K
Tau

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2007.08.045

Cite this

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., ... Zupanc, A. (2007). Study of τ^- → K_S π^- ν_τ decay at Belle. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 654(3-4), 65-73. https://doi.org/10.1016/j.physletb.2007.08.045

Epifanov, D, Adachi, I, Aihara, H, Arinstein, K, Aulchenko, V, Aushev, T, Bakich, AM, Balagura, V, Barberio, E, Bedny, I, Belous, K, Bitenc, U, Bizjak, I, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chao, Y, Chen, A, Chen, KF, Chen, WT, Cheon, BG, Chiang, CC, Chistov, R, Cho, IS, Choi, Y, Choi, YK, 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, WS, Hsiung, YB, Hyun, HJ, Iijima, T, Ikado, K, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Kah, DH, Kaji, H, Kang, JH, Kawai, H, Kawasaki, T, Kichimi, H, Kim, HO, Kim, SK, Kim, YJ, Križan, P, Krokovny, P, Kumar, R, Kuo, CC, Kuzmin, A, Kwon, YJ, Lee, JS, Lee, MJ, Lee, SE, Lesiak, T, Li, J, Limosani, A, Lin, SW, Liu, Y, Liventsev, D, Mandl, F, Marlow, D, Matsumoto, T, Matyja, A, McOnie, S, Medvedeva, T, Miyata, H, Miyazaki, Y, Mizuk, R, Moloney, GR, 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, CW, Park, H, Park, KS, Peak, LS, Pestotnik, R, Piilonen, LE, Poluektov, A, Sahoo, H, Sakai, Y, Schneider, O, Seidl, R, Senyo, K, Sevior, ME, 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, GN, Teramoto, Y, Tian, XC, 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, CH, Wang, P, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Yuan, CZ, Zhang, ZP, Zhilich, V & Zupanc, A 2007, 'Study of τ^- → K_S π^- ν_τ decay at Belle', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 654, no. 3-4, pp. 65-73. https://doi.org/10.1016/j.physletb.2007.08.045

@article{dd2f2ffba1ca4e5caf75e1ee1c407ec5,

title = "Study of τ- → KS π- ντ decay at Belle",

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.",

keywords = "K, Tau",

author = "D. Epifanov and I. Adachi and H. Aihara and K. Arinstein and V. Aulchenko and T. Aushev and Bakich, \{A. M.\} and V. Balagura and E. Barberio and I. Bedny and K. Belous and U. Bitenc and I. Bizjak and A. Bondar and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and Y. Chao and A. Chen and Chen, \{K. F.\} and Chen, \{W. T.\} and Cheon, \{B. G.\} and Chiang, \{C. C.\} and R. Chistov and Cho, \{I. S.\} and Y. Choi and Choi, \{Y. K.\} and J. Dalseno and M. Dash and A. Drutskoy and S. Eidelman and G. Gokhroo and B. Golob and H. Ha and J. Haba and K. Hayasaka and H. Hayashii and M. Hazumi and D. Heffernan and T. Hokuue and Y. Hoshi and Hou, \{W. S.\} and Hsiung, \{Y. B.\} and Hyun, \{H. J.\} and T. Iijima and K. Ikado and K. Inami and A. Ishikawa and R. Itoh and M. Iwasaki and Y. Iwasaki and Kah, \{D. H.\} and H. Kaji and Kang, \{J. H.\} and H. Kawai and T. Kawasaki and H. Kichimi and Kim, \{H. O.\} and Kim, \{S. K.\} and Kim, \{Y. J.\} and P. Kri{\v z}an and P. Krokovny and R. Kumar and Kuo, \{C. C.\} and A. Kuzmin and Kwon, \{Y. J.\} and Lee, \{J. S.\} and Lee, \{M. J.\} and Lee, \{S. E.\} and T. Lesiak and J. Li and A. Limosani and Lin, \{S. W.\} and Y. Liu and D. Liventsev and F. Mandl and D. Marlow and T. Matsumoto and A. Matyja and S. McOnie and T. Medvedeva and H. Miyata and Y. Miyazaki and R. Mizuk and Moloney, \{G. R.\} and T. Mori and E. Nakano and M. Nakao and H. Nakazawa and Z. Natkaniec and S. Nishida and O. Nitoh and S. Ogawa and T. Ohshima and Y. Onuki and W. Ostrowicz and H. Ozaki and P. Pakhlov and G. Pakhlova and H. Palka and Park, \{C. W.\} and H. Park and Park, \{K. S.\} and Peak, \{L. S.\} and R. Pestotnik and Piilonen, \{L. E.\} and A. Poluektov and H. Sahoo and Y. Sakai and O. Schneider and R. Seidl and K. Senyo and Sevior, \{M. E.\} and M. Shapkin and H. Shibuya and B. Shwartz and A. Sokolov and A. Somov and N. Soni and S. Stani{\v c} and M. Stari{\v c} and H. Stoeck and T. Sumiyoshi and F. Takasaki and K. Tamai and M. Tanaka and Taylor, \{G. N.\} and Y. Teramoto and Tian, \{X. C.\} and I. Tikhomirov and T. Tsuboyama and S. Uehara and K. Ueno and T. Uglov and Y. Unno and S. Uno and P. Urquijo and Y. Usov and G. Varner and K. Vervink and S. Villa and A. Vinokurova and Wang, \{C. H.\} and P. Wang and Y. Watanabe and R. Wedd and E. Won and Yabsley, \{B. D.\} and A. Yamaguchi and Y. Yamashita and M. Yamauchi and Yuan, \{C. Z.\} and Zhang, \{Z. P.\} and V. Zhilich and A. Zupanc",

note = "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.",

year = "2007",

month = oct,

day = "11",

doi = "10.1016/j.physletb.2007.08.045",

language = "English",

volume = "654",

pages = "65--73",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

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 - https://www.scopus.com/pages/publications/34548859533

U2 - 10.1016/j.physletb.2007.08.045

DO - 10.1016/j.physletb.2007.08.045

M3 - Article

AN - SCOPUS:34548859533

SN - 0370-2693

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

IS - 3-4

ER -