Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ-

Y. Miyazaki, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko & 147 others J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. C. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, S. M. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, S. E. Lee, T. Lesiak, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, R. Pestotnik, L. E. Piilonen, A. Poluektov, N. Root, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, Eunil Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zürcher

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have searched for τ lepton decays, τ-→Λ̄π- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ-→Λ̄π-) <1.4×10-7 and B(τ-→Λπ-)<0.72×10-7 at the 90% confidence level. This is the first search ever performed for these modes.

Original languageEnglish
Pages (from-to)51-57
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume632
Issue number1
DOIs
Publication statusPublished - 2006 Jan 5

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leptons
baryons
decay
conservation
confidence
detectors
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ- . / Miyazaki, Y.; Abe, K.; Abe, K.; Adachi, I.; Aihara, H.; Arinstein, K.; Asano, Y.; Aulchenko, V.; Aushev, T.; Bahinipati, S.; Bakich, A. M.; Balagura, V.; Barberio, E.; Bedny, I.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T. E.; Chang, P.; Chao, Y.; Chen, A.; Chen, K. F.; Chen, W. T.; Cheon, B. G.; Chistov, R.; Choi, Y.; Chuvikov, A.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Dong, L. Y.; Drutskoy, A.; Eidelman, S.; Enari, Y.; Epifanov, D.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Go, A.; Gokhroo, G.; Golob, B.; Gorišek, A.; Ha, H. C.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W. S.; Iijima, T.; Ikado, K.; Imoto, A.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Kang, J. H.; Kang, J. S.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Khan, H. R.; Kichimi, H.; Kim, H. J.; Kim, J. H.; Kim, S. K.; Kim, S. M.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y. J.; Leder, G.; Lee, S. E.; Lesiak, T.; Lin, S. W.; Liventsev, D.; Majumder, G.; Mandl, F.; Matsumoto, T.; Matyja, A.; Mikami, Y.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Moloney, G. R.; Nagamine, T.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nakazawa, H.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okabe, T.; Okuno, S.; Olsen, S. L.; Onuki, Y.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Palka, H.; Park, C. W.; Parslow, N.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Root, N.; Rozanska, M.; Sakai, Y.; Sato, N.; Satoyama, N.; Sayeed, K.; Schietinger, T.; Schneider, O.; Sevior, M. E.; Shibuya, H.; Shwartz, B.; Sidorov, V.; Somov, A.; Stanič, S.; Starič, M.; Sumisawa, K.; Sumiyoshi, T.; Suzuki, S. Y.; Tajima, O.; Takasaki, F.; Tamai, K.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Tsuboyama, T.; Tsukamoto, T.; Uehara, S.; Uglov, T.; Uno, S.; Urquijo, P.; Varner, G.; Villa, S.; Wang, C. C.; Wang, C. H.; Watanabe, Y.; Won, Eunil; Xie, Q. L.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Ying, J.; Zhang, J.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.; Zürcher, D.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 632, No. 1, 05.01.2006, p. 51-57.

Research output: Contribution to journalArticle

Miyazaki, Y, Abe, K, Abe, K, Adachi, I, Aihara, H, Arinstein, K, Asano, Y, Aulchenko, V, Aushev, T, Bahinipati, S, Bakich, AM, Balagura, V, Barberio, E, Bedny, I, Bitenc, U, Bizjak, I, Blyth, S, Bondar, A, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chang, P, Chao, Y, Chen, A, Chen, KF, Chen, WT, Cheon, BG, Chistov, R, Choi, Y, Chuvikov, A, Cole, S, Dalseno, J, Danilov, M, Dash, M, Dong, LY, Drutskoy, A, Eidelman, S, Enari, Y, Epifanov, D, Fratina, S, Gabyshev, N, Garmash, A, Gershon, T, Go, A, Gokhroo, G, Golob, B, Gorišek, A, Ha, HC, Hayasaka, K, Hayashii, H, Hazumi, M, Hokuue, T, Hoshi, Y, Hou, S, Hou, WS, Iijima, T, Ikado, K, Imoto, A, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, Y, Kang, JH, Kang, JS, Kapusta, P, Katayama, N, Kawai, H, Kawasaki, T, Khan, HR, Kichimi, H, Kim, HJ, Kim, JH, Kim, SK, Kim, SM, Korpar, S, Križan, P, Krokovny, P, Kulasiri, R, Kuo, CC, Kuzmin, A, Kwon, YJ, Leder, G, Lee, SE, Lesiak, T, Lin, SW, Liventsev, D, Majumder, G, Mandl, F, Matsumoto, T, Matyja, A, Mikami, Y, Mitaroff, W, Miyabayashi, K, Miyake, H, Miyata, H, Moloney, GR, Nagamine, T, Nagasaka, Y, Nakano, E, Nakao, M, Nakazawa, H, Natkaniec, Z, Nishida, S, Nitoh, O, Ogawa, S, Ohshima, T, Okabe, T, Okuno, S, Olsen, SL, Onuki, Y, Ostrowicz, W, Ozaki, H, Pakhlov, P, Palka, H, Park, CW, Parslow, N, Pestotnik, R, Piilonen, LE, Poluektov, A, Root, N, Rozanska, M, Sakai, Y, Sato, N, Satoyama, N, Sayeed, K, Schietinger, T, Schneider, O, Sevior, ME, Shibuya, H, Shwartz, B, Sidorov, V, Somov, A, Stanič, S, Starič, M, Sumisawa, K, Sumiyoshi, T, Suzuki, SY, Tajima, O, Takasaki, F, Tamai, K, Tanaka, M, Taylor, GN, Teramoto, Y, Tian, XC, Tsuboyama, T, Tsukamoto, T, Uehara, S, Uglov, T, Uno, S, Urquijo, P, Varner, G, Villa, S, Wang, CC, Wang, CH, Watanabe, Y, Won, E, Xie, QL, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Ying, J, Zhang, J, Zhang, LM, Zhang, ZP, Zhilich, V & Zürcher, D 2006, 'Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ- ', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 632, no. 1, pp. 51-57. https://doi.org/10.1016/j.physletb.2005.10.024
Miyazaki, Y. ; Abe, K. ; Abe, K. ; Adachi, I. ; Aihara, H. ; Arinstein, K. ; Asano, Y. ; Aulchenko, V. ; Aushev, T. ; Bahinipati, S. ; Bakich, A. M. ; Balagura, V. ; Barberio, E. ; Bedny, I. ; Bitenc, U. ; Bizjak, I. ; Blyth, S. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Brodzicka, J. ; Browder, T. E. ; Chang, P. ; Chao, Y. ; Chen, A. ; Chen, K. F. ; Chen, W. T. ; Cheon, B. G. ; Chistov, R. ; Choi, Y. ; Chuvikov, A. ; Cole, S. ; Dalseno, J. ; Danilov, M. ; Dash, M. ; Dong, L. Y. ; Drutskoy, A. ; Eidelman, S. ; Enari, Y. ; Epifanov, D. ; Fratina, S. ; Gabyshev, N. ; Garmash, A. ; Gershon, T. ; Go, A. ; Gokhroo, G. ; Golob, B. ; Gorišek, A. ; Ha, H. C. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Hokuue, T. ; Hoshi, Y. ; Hou, S. ; Hou, W. S. ; Iijima, T. ; Ikado, K. ; Imoto, A. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwasaki, Y. ; Kang, J. H. ; Kang, J. S. ; Kapusta, P. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Khan, H. R. ; Kichimi, H. ; Kim, H. J. ; Kim, J. H. ; Kim, S. K. ; Kim, S. M. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kulasiri, R. ; Kuo, C. C. ; Kuzmin, A. ; Kwon, Y. J. ; Leder, G. ; Lee, S. E. ; Lesiak, T. ; Lin, S. W. ; Liventsev, D. ; Majumder, G. ; Mandl, F. ; Matsumoto, T. ; Matyja, A. ; Mikami, Y. ; Mitaroff, W. ; Miyabayashi, K. ; Miyake, H. ; Miyata, H. ; Moloney, G. R. ; Nagamine, T. ; Nagasaka, Y. ; Nakano, E. ; Nakao, M. ; Nakazawa, H. ; Natkaniec, Z. ; Nishida, S. ; Nitoh, O. ; Ogawa, S. ; Ohshima, T. ; Okabe, T. ; Okuno, S. ; Olsen, S. L. ; Onuki, Y. ; Ostrowicz, W. ; Ozaki, H. ; Pakhlov, P. ; Palka, H. ; Park, C. W. ; Parslow, N. ; Pestotnik, R. ; Piilonen, L. E. ; Poluektov, A. ; Root, N. ; Rozanska, M. ; Sakai, Y. ; Sato, N. ; Satoyama, N. ; Sayeed, K. ; Schietinger, T. ; Schneider, O. ; Sevior, M. E. ; Shibuya, H. ; Shwartz, B. ; Sidorov, V. ; Somov, A. ; Stanič, S. ; Starič, M. ; Sumisawa, K. ; Sumiyoshi, T. ; Suzuki, S. Y. ; Tajima, O. ; Takasaki, F. ; Tamai, K. ; Tanaka, M. ; Taylor, G. N. ; Teramoto, Y. ; Tian, X. C. ; Tsuboyama, T. ; Tsukamoto, T. ; Uehara, S. ; Uglov, T. ; Uno, S. ; Urquijo, P. ; Varner, G. ; Villa, S. ; Wang, C. C. ; Wang, C. H. ; Watanabe, Y. ; Won, Eunil ; Xie, Q. L. ; Yamaguchi, A. ; Yamashita, Y. ; Yamauchi, M. ; Ying, J. ; Zhang, J. ; Zhang, L. M. ; Zhang, Z. P. ; Zhilich, V. ; Zürcher, D. / Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ- In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2006 ; Vol. 632, No. 1. pp. 51-57.
@article{33b7f97a4a7a401d8722ec0bc5f2d9a2,
title = "Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ-",
abstract = "We have searched for τ lepton decays, τ-→Λ̄π- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ-→Λ̄π-) <1.4×10-7 and B(τ-→Λπ-)<0.72×10-7 at the 90{\%} confidence level. This is the first search ever performed for these modes.",
author = "Y. Miyazaki and K. Abe and K. Abe and I. Adachi and H. Aihara and K. Arinstein and Y. Asano and V. Aulchenko and T. Aushev and S. Bahinipati and Bakich, {A. M.} and V. Balagura and E. Barberio and I. Bedny and U. Bitenc and I. Bizjak and S. Blyth and A. Bondar and A. Bozek and M. Bračko and J. Brodzicka and Browder, {T. E.} and P. Chang and Y. Chao and A. Chen and Chen, {K. F.} and Chen, {W. T.} and Cheon, {B. G.} and R. Chistov and Y. Choi and A. Chuvikov and S. Cole and J. Dalseno and M. Danilov and M. Dash and Dong, {L. Y.} and A. Drutskoy and S. Eidelman and Y. Enari and D. Epifanov and S. Fratina and N. Gabyshev and A. Garmash and T. Gershon and A. Go and G. Gokhroo and B. Golob and A. Gorišek and Ha, {H. C.} and K. Hayasaka and H. Hayashii and M. Hazumi and T. Hokuue and Y. Hoshi and S. Hou and Hou, {W. S.} and T. Iijima and K. Ikado and A. Imoto and K. Inami and A. Ishikawa and R. Itoh and Y. Iwasaki and Kang, {J. H.} and Kang, {J. S.} and P. Kapusta and N. Katayama and H. Kawai and T. Kawasaki and Khan, {H. R.} and H. Kichimi and Kim, {H. J.} and Kim, {J. H.} and Kim, {S. K.} and Kim, {S. M.} and S. Korpar and P. Križan and P. Krokovny and R. Kulasiri and Kuo, {C. C.} and A. Kuzmin and Kwon, {Y. J.} and G. Leder and Lee, {S. E.} and T. Lesiak and Lin, {S. W.} and D. Liventsev and G. Majumder and F. Mandl and T. Matsumoto and A. Matyja and Y. Mikami and W. Mitaroff and K. Miyabayashi and H. Miyake and H. Miyata and Moloney, {G. R.} and T. Nagamine and Y. Nagasaka 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 T. Okabe and S. Okuno and Olsen, {S. L.} and Y. Onuki and W. Ostrowicz and H. Ozaki and P. Pakhlov and H. Palka and Park, {C. W.} and N. Parslow and R. Pestotnik and Piilonen, {L. E.} and A. Poluektov and N. Root and M. Rozanska and Y. Sakai and N. Sato and N. Satoyama and K. Sayeed and T. Schietinger and O. Schneider and Sevior, {M. E.} and H. Shibuya and B. Shwartz and V. Sidorov and A. Somov and S. Stanič and M. Starič and K. Sumisawa and T. Sumiyoshi and Suzuki, {S. Y.} and O. Tajima and F. Takasaki and K. Tamai and M. Tanaka and Taylor, {G. N.} and Y. Teramoto and Tian, {X. C.} and T. Tsuboyama and T. Tsukamoto and S. Uehara and T. Uglov and S. Uno and P. Urquijo and G. Varner and S. Villa and Wang, {C. C.} and Wang, {C. H.} and Y. Watanabe and Eunil Won and Xie, {Q. L.} and A. Yamaguchi and Y. Yamashita and M. Yamauchi and J. Ying and J. Zhang and Zhang, {L. M.} and Zhang, {Z. P.} and V. Zhilich and D. Z{\"u}rcher",
year = "2006",
month = "1",
day = "5",
doi = "10.1016/j.physletb.2005.10.024",
language = "English",
volume = "632",
pages = "51--57",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ-

AU - Miyazaki, Y.

AU - Abe, K.

AU - Abe, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Arinstein, K.

AU - Asano, Y.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barberio, E.

AU - Bedny, I.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Blyth, S.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, K. F.

AU - Chen, W. T.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, Y.

AU - Chuvikov, A.

AU - Cole, S.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Dong, L. Y.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Enari, Y.

AU - Epifanov, D.

AU - Fratina, S.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gershon, T.

AU - Go, A.

AU - Gokhroo, G.

AU - Golob, B.

AU - Gorišek, A.

AU - Ha, H. C.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, S.

AU - Hou, W. S.

AU - Iijima, T.

AU - Ikado, K.

AU - Imoto, A.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Kang, J. H.

AU - Kang, J. S.

AU - Kapusta, P.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Khan, H. R.

AU - Kichimi, H.

AU - Kim, H. J.

AU - Kim, J. H.

AU - Kim, S. K.

AU - Kim, S. M.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kulasiri, R.

AU - Kuo, C. C.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Leder, G.

AU - Lee, S. E.

AU - Lesiak, T.

AU - Lin, S. W.

AU - Liventsev, D.

AU - Majumder, G.

AU - Mandl, F.

AU - Matsumoto, T.

AU - Matyja, A.

AU - Mikami, Y.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyake, H.

AU - Miyata, H.

AU - Moloney, G. R.

AU - Nagamine, T.

AU - Nagasaka, Y.

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 - Okabe, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Onuki, Y.

AU - Ostrowicz, W.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Palka, H.

AU - Park, C. W.

AU - Parslow, N.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Poluektov, A.

AU - Root, N.

AU - Rozanska, M.

AU - Sakai, Y.

AU - Sato, N.

AU - Satoyama, N.

AU - Sayeed, K.

AU - Schietinger, T.

AU - Schneider, O.

AU - Sevior, M. E.

AU - Shibuya, H.

AU - Shwartz, B.

AU - Sidorov, V.

AU - Somov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Sumisawa, K.

AU - Sumiyoshi, T.

AU - Suzuki, S. Y.

AU - Tajima, O.

AU - Takasaki, F.

AU - Tamai, K.

AU - Tanaka, M.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Tian, X. C.

AU - Tsuboyama, T.

AU - Tsukamoto, T.

AU - Uehara, S.

AU - Uglov, T.

AU - Uno, S.

AU - Urquijo, P.

AU - Varner, G.

AU - Villa, S.

AU - Wang, C. C.

AU - Wang, C. H.

AU - Watanabe, Y.

AU - Won, Eunil

AU - Xie, Q. L.

AU - Yamaguchi, A.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Ying, J.

AU - Zhang, J.

AU - Zhang, L. M.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zürcher, D.

PY - 2006/1/5

Y1 - 2006/1/5

N2 - We have searched for τ lepton decays, τ-→Λ̄π- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ-→Λ̄π-) <1.4×10-7 and B(τ-→Λπ-)<0.72×10-7 at the 90% confidence level. This is the first search ever performed for these modes.

AB - We have searched for τ lepton decays, τ-→Λ̄π- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ-→Λ̄π-) <1.4×10-7 and B(τ-→Λπ-)<0.72×10-7 at the 90% confidence level. This is the first search ever performed for these modes.

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UR - http://www.scopus.com/inward/citedby.url?scp=29144518369&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2005.10.024

DO - 10.1016/j.physletb.2005.10.024

M3 - Article

VL - 632

SP - 51

EP - 57

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 - 1

ER -