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Measurement of the τ-lepton lifetime at Belle.
Belous, K; Shapkin, M; Sokolov, A; Adachi, I; Aihara, H; Asner, D M; Aulchenko, V; Bakich, A M; Bala, A; Bhuyan, B; Bobrov, A; Bondar, A; Bonvicini, G; Bozek, A; Bracko, M; Browder, T E; Cervenkov, D; Chekelian, V; Chen, A; Cheon, B G; Chilikin, K; Chistov, R; Cho, K; Chobanova, V; Choi, Y; Cinabro, D; Dalseno, J; Dolezal, Z; Dutta, D; Eidelman, S; Epifanov, D; Farhat, H; Fast, J E; Ferber, T; Gaur, V; Ganguly, S; Garmash, A; Gillard, R; Goh, Y M; Golob, B; Haba, J; Hara, T; Hayasaka, K; Hayashii, H; Hoshi, Y; Hou, W-S; Iijima, T; Inami, K; Ishikawa, A; Itoh, R.
Afiliação
  • Belous K; Institute for High Energy Physics, Protvino 142281.
  • Shapkin M; Institute for High Energy Physics, Protvino 142281.
  • Sokolov A; Institute for High Energy Physics, Protvino 142281.
  • Adachi I; High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  • Aihara H; Department of Physics, University of Tokyo, Tokyo 113-0033.
  • Asner DM; Pacific Northwest National Laboratory, Richland, Washington 99352.
  • Aulchenko V; Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  • Bakich AM; School of Physics, University of Sydney, New South Wales 2006.
  • Bala A; Panjab University, Chandigarh 160014.
  • Bhuyan B; Indian Institute of Technology Guwahati, Assam 781039.
  • Bobrov A; Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  • Bondar A; Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  • Bonvicini G; Wayne State University, Detroit, Michigan 48202.
  • Bozek A; H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
  • Bracko M; J. Stefan Institute, 1000 Ljubljana and University of Maribor, 2000 Maribor.
  • Browder TE; University of Hawaii, Honolulu, Hawaii 96822.
  • Cervenkov D; Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
  • Chekelian V; Max-Planck-Institut für Physik, 80805 München.
  • Chen A; National Central University, Chung-li 32054.
  • Cheon BG; Hanyang University, Seoul 133-791.
  • Chilikin K; Institute for Theoretical and Experimental Physics, Moscow 117218.
  • Chistov R; Institute for Theoretical and Experimental Physics, Moscow 117218.
  • Cho K; Korea Institute of Science and Technology Information, Daejeon 305-806.
  • Chobanova V; Max-Planck-Institut für Physik, 80805 München.
  • Choi Y; Sungkyunkwan University, Suwon 440-746.
  • Cinabro D; Wayne State University, Detroit, Michigan 48202.
  • Dalseno J; Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
  • Dolezal Z; Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
  • Dutta D; Indian Institute of Technology Guwahati, Assam 781039.
  • Eidelman S; Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  • Epifanov D; Department of Physics, University of Tokyo, Tokyo 113-0033.
  • Farhat H; Wayne State University, Detroit, Michigan 48202.
  • Fast JE; Pacific Northwest National Laboratory, Richland, Washington 99352.
  • Ferber T; Deutsches Elektronen-Synchrotron, 22607 Hamburg.
  • Gaur V; Tata Institute of Fundamental Research, Mumbai 400005.
  • Ganguly S; Wayne State University, Detroit, Michigan 48202.
  • Garmash A; Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  • Gillard R; Wayne State University, Detroit, Michigan 48202.
  • Goh YM; Hanyang University, Seoul 133-791.
  • Golob B; J. Stefan Institute, 1000 Ljubljana and Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
  • Haba J; High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  • Hara T; High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  • Hayasaka K; Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
  • Hayashii H; Nara Women's University, Nara 630-8506.
  • Hoshi Y; Tohoku Gakuin University, Tagajo 985-8537.
  • Hou WS; Department of Physics, National Taiwan University, Taipei 10617.
  • Iijima T; Graduate School of Science, Nagoya University, Nagoya 464-8602 and Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
  • Inami K; Graduate School of Science, Nagoya University, Nagoya 464-8602.
  • Ishikawa A; Tohoku University, Sendai 980-8578.
  • Itoh R; High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
Phys Rev Lett ; 112(3): 031801, 2014 Jan 24.
Article em En | MEDLINE | ID: mdl-24484129
ABSTRACT
The lifetime of the τ lepton is measured using the process e+ e- → τ+ τ- , where both τ leptons decay to 3πν(τ). The result for the mean lifetime, based on 711 fb(-1) of data collected with the Belle detector at the ϒ(4S) resonance and 60 MeV below, is τ=(290.17±0.53(stat)±0.33(syst))×10(-15) s. The first measurement of the lifetime difference between τ+ and τ- is performed. The upper limit on the relative lifetime difference between positive and negative τ leptons is |Δτ|/τ<7.0×10(-3) at 90% C.L.
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Partículas Elementares / Modelos Teóricos / Física Nuclear Idioma: En Ano de publicação: 2014 Tipo de documento: Article
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Partículas Elementares / Modelos Teóricos / Física Nuclear Idioma: En Ano de publicação: 2014 Tipo de documento: Article