Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons
Miyazaki, Y.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bakich, A.M.; Balagura, V.; Barberio, E.; Bay, A.; Belous, K.; Bhardwaj, V.; Bischofberger, M.; Bondar, A.; Bračko, M.; Browder, T.E.; Chang, P.; Chen, A.; Cheon, B.G.; Cho, I.-S.; Choi, Y.; Dalseno, J.; Dash, M.; Dungel, W.; Eidelman, S.; Epifanov, D.; Feindt, M.; Gabyshev, N.; Garmash, A.; Goldenzweig, P.; Ha, H.; Haba, J.; Hara, K.; Hasegawa, Y.; Hayasaka, K.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W.-S.; Hyun, H.J.; Iijima, T.; Inami, K.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Julius, T.; Kah, D.H.; Kang, J.H.; Kawai, H.; Kawasaki, T.; Kim, H.O.; Kim, J.H.; Kim, S.K.; Kim, Y.I.; Kim, Y.J.; Ko, B.R.; Korpar, S.; Križan, P.; Krokovny, P.; Kumar, R.; Kumita, T.; Kuzmin, A.; Kwon, Y.-J.; Kyeong, S.-H.; Lee, S.-H.; Lesiak, T.; Li, J.; Liu, C.; Liventsev, D.; Louvot, R.; Matyja, A.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Nagamine, T.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nishida, S.; Nishimura, K.; Nitoh, O.; Ohshima, T.; Okuno, S.; Olsen, S.L.; Pakhlov, P.; Pakhlova, G.; Palka, H.; Park, C.W.; Park, H.; Park, H.K.; Pestotnik, R.; Piilonen, L.E.; Poluektov, A.; Sakai, Y.; Schneider, O.; Schwanda, C.; Senyo, K.; Shapkin, M.; Shebalin, V.; Shiu, J.-G.; Shwartz, B.; Sokolov, A.; Solovieva, E.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Taylor, G.N.; Teramoto, Y.; Tikhomirov, I.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vinokurova, A.; Wang, C.H.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B.D.; Yamashita, Y.; Yusa, Y.; Zhang, Z.P.; Zhilich, V.; Zhulanov, V.; Zivko, T.; Zupanc, A.; Zyukova, O.
2010
Abstract
We search for lepton flavor and lepton number violating τ decays into a lepton (ℓ = electron or muon) and two charged mesons (h, h′ = π± or K±), τ- → ℓ- h+ h′ - and τ- → ℓ+ h- h′ -, using 671 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. We obtain 90% C.L. upper limits on the branching fractions in the range (4.4 - 8.8) × 10- 8 for τ → e h h′, and (3.3 - 16) × 10- 8 for τ → μ h h′ processes. These results improve upon previously published upper limits by factors between 1.6 to 8.8. © 2009 Elsevier B.V. All rights reserved.
Details
Title
Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons
Author(s)
Miyazaki, Y. ; Aihara, H. ; Arinstein, K. ; Aulchenko, V. ; Aushev, T. ; Bakich, A.M. ; Balagura, V. ; Barberio, E. ; Bay, A. ; Belous, K. ; Bhardwaj, V. ; Bischofberger, M. ; Bondar, A. ; Bračko, M. ; Browder, T.E. ; Chang, P. ; Chen, A. ; Cheon, B.G. ; Cho, I.-S. ; Choi, Y. ; Dalseno, J. ; Dash, M. ; Dungel, W. ; Eidelman, S. ; Epifanov, D. ; Feindt, M. ; Gabyshev, N. ; Garmash, A. ; Goldenzweig, P. ; Ha, H. ; Haba, J. ; Hara, K. ; Hasegawa, Y. ; Hayasaka, K. ; Hayashii, H. ; Horii, Y. ; Hoshi, Y. ; Hou, W.-S. ; Hyun, H.J. ; Iijima, T. ; Inami, K. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Julius, T. ; Kah, D.H. ; Kang, J.H. ; Kawai, H. ; Kawasaki, T. ; Kim, H.O. ; Kim, J.H. ; Kim, S.K. ; Kim, Y.I. ; Kim, Y.J. ; Ko, B.R. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kumar, R. ; Kumita, T. ; Kuzmin, A. ; Kwon, Y.-J. ; Kyeong, S.-H. ; Lee, S.-H. ; Lesiak, T. ; Li, J. ; Liu, C. ; Liventsev, D. ; Louvot, R. ; Matyja, A. ; McOnie, S. ; Miyabayashi, K. ; Miyata, H. ; Nagamine, T. ; Nagasaka, Y. ; Nakano, E. ; Nakao, M. ; Nishida, S. ; Nishimura, K. ; Nitoh, O. ; Ohshima, T. ; Okuno, S. ; Olsen, S.L. ; Pakhlov, P. ; Pakhlova, G. ; Palka, H. ; Park, C.W. ; Park, H. ; Park, H.K. ; Pestotnik, R. ; Piilonen, L.E. ; Poluektov, A. ; Sakai, Y. ; Schneider, O. ; Schwanda, C. ; Senyo, K. ; Shapkin, M. ; Shebalin, V. ; Shiu, J.-G. ; Shwartz, B. ; Sokolov, A. ; Solovieva, E. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Taylor, G.N. ; Teramoto, Y. ; Tikhomirov, I. ; Uehara, S. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Varner, G. ; Vinokurova, A. ; Wang, C.H. ; Wang, P. ; Watanabe, Y. ; Wedd, R. ; Won, E. ; Yabsley, B.D. ; Yamashita, Y. ; Yusa, 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
682
Issue
4-5
Pages
355-362
Date
2010
ISSN
03702693
Keywords
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Laboratories
LPHE
Record Appears in
Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LPHE - High Energy Physics Laboratory
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date
2010-11-05