Measurement of the τ-lepton lifetime at Belle.
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.
Institute for High Energy Physics, Protvino 142281.
K
K
Belous
Institute for High Energy Physics, Protvino 142281.
M
M
Shapkin
Institute for High Energy Physics, Protvino 142281.
A
A
Sokolov
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
I
I
Adachi
Department of Physics, University of Tokyo, Tokyo 113-0033.
H
H
Aihara
Pacific Northwest National Laboratory, Richland, Washington 99352.
D M
DM
Asner
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
V
V
Aulchenko
School of Physics, University of Sydney, New South Wales 2006.
A M
AM
Bakich
Panjab University, Chandigarh 160014.
A
A
Bala
Indian Institute of Technology Guwahati, Assam 781039.
B
B
Bhuyan
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
A
A
Bobrov
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
A
A
Bondar
Wayne State University, Detroit, Michigan 48202.
G
G
Bonvicini
H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
A
A
Bozek
J. Stefan Institute, 1000 Ljubljana and University of Maribor, 2000 Maribor.
M
M
Bračko
University of Hawaii, Honolulu, Hawaii 96822.
T E
TE
Browder
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
D
D
Červenkov
Max-Planck-Institut für Physik, 80805 München.
V
V
Chekelian
National Central University, Chung-li 32054.
A
A
Chen
Hanyang University, Seoul 133-791.
B G
BG
Cheon
Institute for Theoretical and Experimental Physics, Moscow 117218.
K
K
Chilikin
Institute for Theoretical and Experimental Physics, Moscow 117218.
R
R
Chistov
Korea Institute of Science and Technology Information, Daejeon 305-806.
K
K
Cho
Max-Planck-Institut für Physik, 80805 München.
V
V
Chobanova
Sungkyunkwan University, Suwon 440-746.
Y
Y
Choi
Wayne State University, Detroit, Michigan 48202.
D
D
Cinabro
Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
J
J
Dalseno
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
Z
Z
Doležal
Indian Institute of Technology Guwahati, Assam 781039.
D
D
Dutta
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
S
S
Eidelman
Department of Physics, University of Tokyo, Tokyo 113-0033.
D
D
Epifanov
Wayne State University, Detroit, Michigan 48202.
H
H
Farhat
Pacific Northwest National Laboratory, Richland, Washington 99352.
J E
JE
Fast
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
T
T
Ferber
Tata Institute of Fundamental Research, Mumbai 400005.
V
V
Gaur
Wayne State University, Detroit, Michigan 48202.
S
S
Ganguly
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
A
A
Garmash
Wayne State University, Detroit, Michigan 48202.
R
R
Gillard
Hanyang University, Seoul 133-791.
Y M
YM
Goh
J. Stefan Institute, 1000 Ljubljana and Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
B
B
Golob
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
J
J
Haba
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
T
T
Hara
Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
K
K
Hayasaka
Nara Women's University, Nara 630-8506.
H
H
Hayashii
Tohoku Gakuin University, Tagajo 985-8537.
Y
Y
Hoshi
Department of Physics, National Taiwan University, Taipei 10617.
W-S
WS
Hou
Graduate School of Science, Nagoya University, Nagoya 464-8602 and Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
T
T
Iijima
Graduate School of Science, Nagoya University, Nagoya 464-8602.
K
K
Inami
Tohoku University, Sendai 980-8578.
A
A
Ishikawa
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
R
R
Itoh
Nara Women's University, Nara 630-8506.
T
T
Iwashita
University of Hawaii, Honolulu, Hawaii 96822.
I
I
Jaegle
School of Physics, University of Melbourne, Victoria 3010.
T
T
Julius
Tohoku University, Sendai 980-8578.
E
E
Kato
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
H
H
Kichimi
Max-Planck-Institut für Physik, 80805 München.
C
C
Kiesling
Soongsil University, Seoul 156-743.
D Y
DY
Kim
Kyungpook National University, Daegu 702-701.
H J
HJ
Kim
Korea University, Seoul 136-713.
J B
JB
Kim
Kyungpook National University, Daegu 702-701.
M J
MJ
Kim
Korea Institute of Science and Technology Information, Daejeon 305-806.
Y J
YJ
Kim
University of Cincinnati, Cincinnati, Ohio 45221.
K
K
Kinoshita
Korea University, Seoul 136-713.
B R
BR
Ko
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
P
P
Kodyš
J. Stefan Institute, 1000 Ljubljana and University of Maribor, 2000 Maribor.
S
S
Korpar
J. Stefan Institute, 1000 Ljubljana and Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
P
P
Križan
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
P
P
Krokovny
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
T
T
Kuhr
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
A
A
Kuzmin
Yonsei University, Seoul 120-749.
Y-J
YJ
Kwon
Justus-Liebig-Universität Gießen, 35392 Gießen.
J S
JS
Lange
Korea University, Seoul 136-713.
S-H
SH
Lee
Indian Institute of Technology Madras, Chennai 600036.
J
J
Libby
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
D
D
Liventsev
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
P
P
Lukin
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
D
D
Matvienko
Niigata University, Niigata 950-2181.
H
H
Miyata
Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Physical Engineering Institute, Moscow 115409.
R
R
Mizuk
Tata Institute of Fundamental Research, Mumbai 400005.
G B
GB
Mohanty
Graduate School of Science, Nagoya University, Nagoya 464-8602.
T
T
Mori
INFN - Sezione di Torino, 10125 Torino.
R
R
Mussa
Hiroshima Institute of Technology, Hiroshima 731-5193.
Y
Y
Nagasaka
Osaka City University, Osaka 558-8585.
E
E
Nakano
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
M
M
Nakao
Indian Institute of Technology Madras, Chennai 600036.
M
M
Nayak
Max-Planck-Institut für Physik, 80805 München.
E
E
Nedelkovska
Department of Physics, University of Tokyo, Tokyo 113-0033.
C
C
Ng
Tata Institute of Fundamental Research, Mumbai 400005.
N K
NK
Nisar
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
S
S
Nishida
Tokyo University of Agriculture and Technology, Tokyo 184-8588.
O
O
Nitoh
Toho University, Funabashi 274-8510.
S
S
Ogawa
Kanagawa University, Yokohama 221-8686.
S
S
Okuno
Seoul National University, Seoul 151-742.
S L
SL
Olsen
H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
W
W
Ostrowicz
Institute for Theoretical and Experimental Physics, Moscow 117218.
G
G
Pakhlova
Sungkyunkwan University, Suwon 440-746.
C W
CW
Park
Kyungpook National University, Daegu 702-701.
H
H
Park
Kyungpook National University, Daegu 702-701.
H K
HK
Park
Luther College, Decorah, Iowa 52101.
T K
TK
Pedlar
J. Stefan Institute, 1000 Ljubljana.
R
R
Pestotnik
J. Stefan Institute, 1000 Ljubljana.
M
M
Petrič
CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
L E
LE
Piilonen
Max-Planck-Institut für Physik, 80805 München.
M
M
Ritter
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
M
M
Röhrken
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
A
A
Rostomyan
Seoul National University, Seoul 151-742.
S
S
Ryu
University of Hawaii, Honolulu, Hawaii 96822.
H
H
Sahoo
Tohoku University, Sendai 980-8578.
T
T
Saito
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
Y
Y
Sakai
Tata Institute of Fundamental Research, Mumbai 400005.
S
S
Sandilya
University of Cincinnati, Cincinnati, Ohio 45221.
D
D
Santel
J. Stefan Institute, 1000 Ljubljana.
L
L
Santelj
Tohoku University, Sendai 980-8578.
T
T
Sanuki
University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
V
V
Savinov
École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
O
O
Schneider
University of the Basque Country UPV/EHU, 48080 Bilbao and Ikerbasque, 48011 Bilbao.
G
G
Schnell
Institute of High Energy Physics, Vienna 1050.
C
C
Schwanda
Justus-Liebig-Universität Gießen, 35392 Gießen.
D
D
Semmler
Yamagata University, Yamagata 990-8560.
K
K
Senyo
Graduate School of Science, Nagoya University, Nagoya 464-8602.
O
O
Seon
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
V
V
Shebalin
Beihang University, Beijing 100191.
C P
CP
Shen
Tokyo Institute of Technology, Tokyo 152-8550.
T-A
TA
Shibata
Department of Physics, National Taiwan University, Taipei 10617.
J-G
JG
Shiu
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
B
B
Shwartz
School of Physics, University of Sydney, New South Wales 2006.
A
A
Sibidanov
Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
F
F
Simon
Yonsei University, Seoul 120-749.
Y-S
YS
Sohn
University of Nova Gorica, 5000 Nova Gorica.
S
S
Stanič
J. Stefan Institute, 1000 Ljubljana.
M
M
Starič
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
M
M
Steder
Tokyo Metropolitan University, Tokyo 192-0397.
T
T
Sumiyoshi
INFN - Sezione di Torino, 10125 Torino and University of Torino, 10124 Torino.
U
U
Tamponi
Pacific Northwest National Laboratory, Richland, Washington 99352.
G
G
Tatishvili
Osaka City University, Osaka 558-8585.
Y
Y
Teramoto
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
K
K
Trabelsi
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
T
T
Tsuboyama
Tokyo Institute of Technology, Tokyo 152-8550.
M
M
Uchida
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
S
S
Uehara
Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Institute of Physics and Technology, Moscow Region 141700.
T
T
Uglov
Hanyang University, Seoul 133-791.
Y
Y
Unno
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
S
S
Uno
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
Y
Y
Usov
University of Hawaii, Honolulu, Hawaii 96822.
S E
SE
Vahsen
University of the Basque Country UPV/EHU, 48080 Bilbao.
C
C
Van Hulse
Max-Planck-Institut für Physik, 80805 München.
P
P
Vanhoefer
University of Hawaii, Honolulu, Hawaii 96822.
G
G
Varner
School of Physics, University of Sydney, New South Wales 2006.
K E
KE
Varvell
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
A
A
Vinokurova
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
V
V
Vorobyev
Justus-Liebig-Universität Gießen, 35392 Gießen.
M N
MN
Wagner
National United University, Miao Li 36003.
C H
CH
Wang
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
P
P
Wang
Niigata University, Niigata 950-2181.
M
M
Watanabe
Kanagawa University, Yokohama 221-8686.
Y
Y
Watanabe
CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
K M
KM
Williams
Korea University, Seoul 136-713.
E
E
Won
University of Hawaii, Honolulu, Hawaii 96822.
J
J
Yamaoka
Nippon Dental University, Niigata 951-8580.
Y
Y
Yamashita
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
S
S
Yashchenko
Yonsei University, Seoul 120-749.
Y
Y
Yook
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
C Z
CZ
Yuan
University of Science and Technology of China, Hefei 230026.
Z P
ZP
Zhang
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
V
V
Zhilich
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
A
A
Zupanc
D004601:Elementary Particles; D008962:Models, Theoretical; D009686:Nuclear Physics / Q000379:methods*; D011789:Quantum Theory