Observation of D0-D0 mixing in e+e- collisions.
We observe D(0)-D(0) mixing in the decay D(0) → K+π- using a data sample of integrated luminosity 976 fb(-1) collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We measure the mixing parameters x'(2) = (0.09 ± 0.22) × 10(-3) and y'=(4.6 ± 3.4) × 10(-3) and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates R(D) = (3.53 ± 0.13) × 10(-3), where the uncertainties are statistical and systematic combined. Our measurement excludes the no-mixing hypothesis at the 5.1 standard deviation level.
Korea University, Seoul 136-713.
B R
BR
Ko
Korea University, Seoul 136-713.
E
E
Won
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
I
I
Adachi
Department of Physics, University of Tokyo, Tokyo 113-0033.
H
H
Aihara
Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
K
K
Arinstein
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
Institute for Theoretical and Experimental Physics, Moscow 117218.
T
T
Aushev
Panjab University, Chandigarh 160014.
A
A
Bala
Nara Women's University, Nara 630-8506.
V
V
Bhardwaj
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
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
Cervenkov
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
Yonsei University, Seoul 120-749.
I-S
IS
Cho
Korea Institute of Science and Technology Information, Daejeon 305-806.
K
K
Cho
Max-Planck-Institut für Physik, 80805 München.
V
V
Chobanova
Gyeongsang National University, Chinju 660-701.
S-K
SK
Choi
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
Institute for Theoretical and Experimental Physics, Moscow 117218 and Moscow Physical Engineering Institute, Moscow 115409.
M
M
Danilov
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
Z
Z
Doležal
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
Z
Z
Drásal
Indian Institute of Technology Guwahati, Assam 781039.
D
D
Dutta
Indian Institute of Technology Guwahati, Assam 781039.
K
K
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
Institute of High Energy Physics, Vienna 1050.
R
R
Glattauer
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
Nara Women's University, Nara 630-8506.
H
H
Hayashii
Peking University, Beijing 100871.
X H
XH
He
Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583.
T
T
Higuchi
Tohoku Gakuin University, Tagajo 985-8537.
Y
Y
Hoshi
Department of Physics, National Taiwan University, Taipei 10617.
W-S
WS
Hou
Kyungpook National University, Daegu 702-701.
H J
HJ
Hyun
Graduate School of Science, Nagoya University, Nagoya 464-8602 and Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
T
T
Iijima
Tohoku University, Sendai 980-8578.
A
A
Ishikawa
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
R
R
Itoh
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
Y
Y
Iwasaki
Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583.
T
T
Iwashita
University of Hawaii, Honolulu, Hawaii 96822.
I
I
Jaegle
School of Physics, University of Melbourne, Victoria 3010.
T
T
Julius
Niigata University, Niigata 950-2181.
T
T
Kawasaki
Max-Planck-Institut für Physik, 80805 München.
C
C
Kiesling
Soongsil University, Seoul 156-743.
D Y
DY
Kim
Korea University, Seoul 136-713.
J B
JB
Kim
Korea Institute of Science and Technology Information, Daejeon 305-806.
J H
JH
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
J. Stefan Institute, 1000 Ljubljana.
J
J
Klucar
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
Tokyo Metropolitan University, Tokyo 192-0397.
T
T
Kumita
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
Seoul National University, Seoul 151-742.
J
J
Li
CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
Y
Y
Li
Indian Institute of Technology Madras, Chennai 600036.
J
J
Libby
University of Science and Technology of China, Hefei 230026.
C
C
Liu
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
Z Q
ZQ
Liu
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
Nara Women's University, Nara 630-8506.
K
K
Miyabayashi
Niigata University, Niigata 950-2181.
H
H
Miyata
Tata Institute of Fundamental Research, Mumbai 400005.
G B
GB
Mohanty
Max-Planck-Institut für Physik, 80805 München and Excellence Cluster Universe, Technische Universität München, 85748 Garching.
A
A
Moll
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
H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
Z
Z
Natkaniec
Indian Institute of Technology Madras, Chennai 600036.
M
M
Nayak
Max-Planck-Institut für Physik, 80805 München.
E
E
Nedelkovska
Tata Institute of Fundamental Research, Mumbai 400005.
N K
NK
Nisar
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
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 K
HK
Park
Luther College, Decorah, Iowa 52101.
T K
TK
Pedlar
University of Science and Technology of China, Hefei 230026.
T
T
Peng
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
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
Y
Y
Sakai
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, Basque Foundation for Science, 48011 Bilbao.
G
G
Schnell
Institute of High Energy Physics, Vienna 1050.
C
C
Schwanda
University of Cincinnati, Cincinnati, Ohio 45221.
A J
AJ
Schwartz
RIKEN BNL Research Center, Upton, New York 11973.
R
R
Seidl
Graduate School of Science, Nagoya University, Nagoya 464-8602.
O
O
Seon
School of Physics, University of Melbourne, Victoria 3010.
M E
ME
Sevior
Institute for High Energy Physics, Protvino 142281.
M
M
Shapkin
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
Panjab University, Chandigarh 160014.
J B
JB
Singh
Yonsei University, Seoul 120-749.
Y-S
YS
Sohn
Institute for High Energy Physics, Protvino 142281.
A
A
Sokolov
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
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
University of Bonn, 53115 Bonn.
P
P
Urquijo
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
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
Department of Physics, National Taiwan University, Taipei 10617.
M-Z
MZ
Wang
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
P
P
Wang
Kanagawa University, Yokohama 221-8686.
Y
Y
Watanabe
Tohoku University, Sendai 980-8578.
H
H
Yamamoto
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 C
CC
Zhang
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