Measurement of the τ-lepton lifetime at Belle

K Belous¹, M Shapkin¹, A Sokolov¹, I Adachi², H Aihara³, D M Asner⁴, V Aulchenko⁵, A M Bakich⁶, A Bala⁷, B Bhuyan⁸, A Bobrov⁵, A Bondar⁵, G Bonvicini⁹, A Bozek¹⁰, M Bračko¹¹, T E Browder¹², D Červenkov¹³, V Chekelian¹⁴, A Chen¹⁵, B G Cheon¹⁶, K Chilikin¹⁷, R Chistov¹⁷, K Cho¹⁸, V Chobanova¹⁴, Y Choi¹⁹, D Cinabro⁹, J Dalseno²⁰, Z Doležal¹³, D Dutta⁸, S Eidelman⁵, D Epifanov³, H Farhat⁹, J E Fast⁴, T Ferber²¹, V Gaur²², S Ganguly⁹, A Garmash⁵, R Gillard⁹, Y M Goh¹⁶, B Golob²³, J Haba², T Hara², K Hayasaka²⁴, H Hayashii²⁵, Y Hoshi²⁶, W-S Hou²⁷, T Iijima²⁸, K Inami²⁹, A Ishikawa³⁰, R Itoh², T Iwashita²⁵, I Jaegle¹², T Julius³¹, E Kato³⁰, H Kichimi², C Kiesling¹⁴, D Y Kim³², H J Kim³³, J B Kim³⁴, M J Kim³³, Y J Kim¹⁸, K Kinoshita³⁵, B R Ko³⁴, P Kodyš¹³, S Korpar¹¹, P Križan²³, P Krokovny⁵, T Kuhr³⁶, A Kuzmin⁵, Y-J Kwon³⁷, J S Lange³⁸, S-H Lee³⁴, J Libby³⁹, D Liventsev², P Lukin⁵, D Matvienko⁵, H Miyata⁴⁰, R Mizuk⁴¹, G B Mohanty²², T Mori²⁹, R Mussa⁴², Y Nagasaka⁴³, E Nakano⁴⁴, M Nakao², M Nayak³⁹, E Nedelkovska¹⁴, C Ng³, N K Nisar²², S Nishida², O Nitoh⁴⁵, S Ogawa⁴⁶, S Okuno⁴⁷, S L Olsen⁴⁸, W Ostrowicz¹⁰, G Pakhlova¹⁷, C W Park¹⁹, H Park³³, H K Park³³, T K Pedlar⁴⁹, R Pestotnik⁵⁰, M Petrič⁵⁰, L E Piilonen⁵¹, M Ritter¹⁴, M Röhrken³⁶, A Rostomyan²¹, S Ryu⁴⁸, H Sahoo¹², T Saito³⁰, Y Sakai², S Sandilya²², D Santel³⁵, L Santelj⁵⁰, T Sanuki³⁰, V Savinov⁵², O Schneider⁵³, G Schnell⁵⁴, C Schwanda⁵⁵, D Semmler³⁸, K Senyo⁵⁶, O Seon²⁹, V Shebalin⁵, C P Shen⁵⁷, T-A Shibata⁵⁸, J-G Shiu²⁷, B Shwartz⁵, A Sibidanov⁶, F Simon²⁰, Y-S Sohn³⁷, S Stanič⁵⁹, M Starič⁵⁰, M Steder²¹, T Sumiyoshi⁶⁰, U Tamponi⁶¹, G Tatishvili⁴, Y Teramoto⁴⁴, K Trabelsi², T Tsuboyama², M Uchida⁵⁸, S Uehara², T Uglov⁶², Y Unno¹⁶, S Uno², Y Usov⁵, S E Vahsen¹², C Van Hulse⁶³, P Vanhoefer¹⁴, G Varner¹², K E Varvell⁶, A Vinokurova⁵, V Vorobyev⁵, M N Wagner³⁸, C H Wang⁶⁴, P Wang⁶⁵, M Watanabe⁴⁰, Y Watanabe⁴⁷, K M Williams⁵¹, E Won³⁴, J Yamaoka¹², Y Yamashita⁶⁶, S Yashchenko²¹, Y Yook³⁷, C Z Yuan⁶⁵, Z P Zhang⁶⁷, V Zhilich⁵, A Zupanc³⁶; Belle Collaboration

Affiliations

¹ Institute for High Energy Physics, Protvino 142281.
² High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
³ Department of Physics, University of Tokyo, Tokyo 113-0033.
⁴ Pacific Northwest National Laboratory, Richland, Washington 99352.
⁵ Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
⁶ School of Physics, University of Sydney, New South Wales 2006.
⁷ Panjab University, Chandigarh 160014.
⁸ Indian Institute of Technology Guwahati, Assam 781039.
⁹ Wayne State University, Detroit, Michigan 48202.
¹⁰ H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
¹¹ J. Stefan Institute, 1000 Ljubljana and University of Maribor, 2000 Maribor.
¹² University of Hawaii, Honolulu, Hawaii 96822.
¹³ Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
¹⁴ Max-Planck-Institut für Physik, 80805 München.
¹⁵ National Central University, Chung-li 32054.
¹⁶ Hanyang University, Seoul 133-791.
¹⁷ Institute for Theoretical and Experimental Physics, Moscow 117218.
¹⁸ Korea Institute of Science and Technology Information, Daejeon 305-806.
¹⁹ Sungkyunkwan University, Suwon 440-746.
²⁰ Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
²¹ Deutsches Elektronen-Synchrotron, 22607 Hamburg.
²² Tata Institute of Fundamental Research, Mumbai 400005.
²³ J. Stefan Institute, 1000 Ljubljana and Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
²⁴ Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
²⁵ Nara Women's University, Nara 630-8506.
²⁶ Tohoku Gakuin University, Tagajo 985-8537.
²⁷ Department of Physics, National Taiwan University, Taipei 10617.
²⁸ Graduate School of Science, Nagoya University, Nagoya 464-8602 and Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
²⁹ Graduate School of Science, Nagoya University, Nagoya 464-8602.
³⁰ Tohoku University, Sendai 980-8578.
³¹ School of Physics, University of Melbourne, Victoria 3010.
³² Soongsil University, Seoul 156-743.
³³ Kyungpook National University, Daegu 702-701.
³⁴ Korea University, Seoul 136-713.
³⁵ University of Cincinnati, Cincinnati, Ohio 45221.
³⁶ Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
³⁷ Yonsei University, Seoul 120-749.
³⁸ Justus-Liebig-Universität Gießen, 35392 Gießen.
³⁹ Indian Institute of Technology Madras, Chennai 600036.
⁴⁰ Niigata University, Niigata 950-2181.
⁴¹ Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Physical Engineering Institute, Moscow 115409.
⁴² INFN - Sezione di Torino, 10125 Torino.
⁴³ Hiroshima Institute of Technology, Hiroshima 731-5193.
⁴⁴ Osaka City University, Osaka 558-8585.
⁴⁵ Tokyo University of Agriculture and Technology, Tokyo 184-8588.
⁴⁶ Toho University, Funabashi 274-8510.
⁴⁷ Kanagawa University, Yokohama 221-8686.
⁴⁸ Seoul National University, Seoul 151-742.
⁴⁹ Luther College, Decorah, Iowa 52101.
⁵⁰ J. Stefan Institute, 1000 Ljubljana.
⁵¹ CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
⁵² University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
⁵³ École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
⁵⁴ University of the Basque Country UPV/EHU, 48080 Bilbao and Ikerbasque, 48011 Bilbao.
⁵⁵ Institute of High Energy Physics, Vienna 1050.
⁵⁶ Yamagata University, Yamagata 990-8560.
⁵⁷ Beihang University, Beijing 100191.
⁵⁸ Tokyo Institute of Technology, Tokyo 152-8550.
⁵⁹ University of Nova Gorica, 5000 Nova Gorica.
⁶⁰ Tokyo Metropolitan University, Tokyo 192-0397.
⁶¹ INFN - Sezione di Torino, 10125 Torino and University of Torino, 10124 Torino.
⁶² Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Institute of Physics and Technology, Moscow Region 141700.
⁶³ University of the Basque Country UPV/EHU, 48080 Bilbao.
⁶⁴ National United University, Miao Li 36003.
⁶⁵ Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
⁶⁶ Nippon Dental University, Niigata 951-8580.
⁶⁷ University of Science and Technology of China, Hefei 230026.

PMID: 24484129
DOI: 10.1103/PhysRevLett.112.031801

Measurement of the τ-lepton lifetime at Belle

K Belous et al. Phys Rev Lett. 2014.

. 2014 Jan 24;112(3):031801.

doi: 10.1103/PhysRevLett.112.031801. Epub 2014 Jan 23.

Authors

Affiliations

¹ Institute for High Energy Physics, Protvino 142281.
² High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
³ Department of Physics, University of Tokyo, Tokyo 113-0033.
⁴ Pacific Northwest National Laboratory, Richland, Washington 99352.
⁵ Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
⁶ School of Physics, University of Sydney, New South Wales 2006.
⁷ Panjab University, Chandigarh 160014.
⁸ Indian Institute of Technology Guwahati, Assam 781039.
⁹ Wayne State University, Detroit, Michigan 48202.
¹⁰ H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
¹¹ J. Stefan Institute, 1000 Ljubljana and University of Maribor, 2000 Maribor.
¹² University of Hawaii, Honolulu, Hawaii 96822.
¹³ Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
¹⁴ Max-Planck-Institut für Physik, 80805 München.
¹⁵ National Central University, Chung-li 32054.
¹⁶ Hanyang University, Seoul 133-791.
¹⁷ Institute for Theoretical and Experimental Physics, Moscow 117218.
¹⁸ Korea Institute of Science and Technology Information, Daejeon 305-806.
¹⁹ Sungkyunkwan University, Suwon 440-746.
²⁰ Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
²¹ Deutsches Elektronen-Synchrotron, 22607 Hamburg.
²² Tata Institute of Fundamental Research, Mumbai 400005.
²³ J. Stefan Institute, 1000 Ljubljana and Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
²⁴ Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
²⁵ Nara Women's University, Nara 630-8506.
²⁶ Tohoku Gakuin University, Tagajo 985-8537.
²⁷ Department of Physics, National Taiwan University, Taipei 10617.
²⁸ Graduate School of Science, Nagoya University, Nagoya 464-8602 and Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
²⁹ Graduate School of Science, Nagoya University, Nagoya 464-8602.
³⁰ Tohoku University, Sendai 980-8578.
³¹ School of Physics, University of Melbourne, Victoria 3010.
³² Soongsil University, Seoul 156-743.
³³ Kyungpook National University, Daegu 702-701.
³⁴ Korea University, Seoul 136-713.
³⁵ University of Cincinnati, Cincinnati, Ohio 45221.
³⁶ Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
³⁷ Yonsei University, Seoul 120-749.
³⁸ Justus-Liebig-Universität Gießen, 35392 Gießen.
³⁹ Indian Institute of Technology Madras, Chennai 600036.
⁴⁰ Niigata University, Niigata 950-2181.
⁴¹ Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Physical Engineering Institute, Moscow 115409.
⁴² INFN - Sezione di Torino, 10125 Torino.
⁴³ Hiroshima Institute of Technology, Hiroshima 731-5193.
⁴⁴ Osaka City University, Osaka 558-8585.
⁴⁵ Tokyo University of Agriculture and Technology, Tokyo 184-8588.
⁴⁶ Toho University, Funabashi 274-8510.
⁴⁷ Kanagawa University, Yokohama 221-8686.
⁴⁸ Seoul National University, Seoul 151-742.
⁴⁹ Luther College, Decorah, Iowa 52101.
⁵⁰ J. Stefan Institute, 1000 Ljubljana.
⁵¹ CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
⁵² University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
⁵³ École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
⁵⁴ University of the Basque Country UPV/EHU, 48080 Bilbao and Ikerbasque, 48011 Bilbao.
⁵⁵ Institute of High Energy Physics, Vienna 1050.
⁵⁶ Yamagata University, Yamagata 990-8560.
⁵⁷ Beihang University, Beijing 100191.
⁵⁸ Tokyo Institute of Technology, Tokyo 152-8550.
⁵⁹ University of Nova Gorica, 5000 Nova Gorica.
⁶⁰ Tokyo Metropolitan University, Tokyo 192-0397.
⁶¹ INFN - Sezione di Torino, 10125 Torino and University of Torino, 10124 Torino.
⁶² Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Institute of Physics and Technology, Moscow Region 141700.
⁶³ University of the Basque Country UPV/EHU, 48080 Bilbao.
⁶⁴ National United University, Miao Li 36003.
⁶⁵ Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
⁶⁶ Nippon Dental University, Niigata 951-8580.
⁶⁷ University of Science and Technology of China, Hefei 230026.

PMID: 24484129
DOI: 10.1103/PhysRevLett.112.031801

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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Measurement of the τ-lepton lifetime at Belle

Affiliations

Measurement of the τ-lepton lifetime at Belle

Authors

Affiliations

Abstract

Publication types

MeSH terms

LinkOut - more resources

Full Text Sources

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