Observation of a narrow charmoniumlike state in exclusive B+/--->K+/-pi+pi-J/psi decays.
We report the observation of a narrow charmoniumlike state produced in the exclusive decay process B+/--->K+/-pi(+)pi(-)J/psi. This state, which decays into pi(+)pi(-)J/psi, has a mass of 3872.0+/-0.6(stat)+/-0.5(syst) MeV, a value that is very near the M(D0)+M(D(*0)) mass threshold. The results are based on an analysis of 152M B-Bmacr; events collected at the Upsilon(4S) resonance in the Belle detector at the KEKB collider. The signal has a statistical significance that is in excess of 10sigma.
Choi
S-K
SK
Gyeongsang National University, Chinju.
Olsen
S L
SL
Abe
K
K
Abe
T
T
Adachi
I
I
Ahn
Byoung Sup
BS
Aihara
H
H
Akai
K
K
Akatsu
M
M
Akemoto
M
M
Asano
Y
Y
Aso
T
T
Aulchenko
V
V
Aushev
T
T
Bakich
A M
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Ban
Y
Y
Banerjee
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Bondar
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Bozek
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A
Bracko
M
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Brodzicka
J
J
Browder
T E
TE
Chang
P
P
Chao
Y
Y
Chen
K-F
KF
Cheon
B G
BG
Chistov
R
R
Choi
Y
Y
Choi
Y K
YK
Danilov
M
M
Dong
L Y
LY
Drutskoy
A
A
Eidelman
S
S
Eiges
V
V
Flanagan
J
J
Fukunaga
C
C
Furukawa
K
K
Gabyshev
N
N
Gershon
T
T
Golob
B
B
Guler
H
H
Guo
R
R
Hagner
C
C
Handa
F
F
Hara
T
T
Hastings
N C
NC
Hayashii
H
H
Hazumi
M
M
Hinz
L
L
Hoshi
Y
Y
Hou
W-S
WS
Hsiung
Y B
YB
Huang
H-C
HC
Iijima
T
T
Inami
K
K
Ishikawa
A
A
Itoh
R
R
Iwasaki
M
M
Iwasaki
Y
Y
Kang
J H
JH
Kataoka
S U
SU
Katayama
N
N
Kawai
H
H
Kawasaki
T
T
Kichimi
H
H
Kikutani
E
E
Kim
H J
HJ
Kim
Hyunwoo
H
Kim
J H
JH
Kim
S K
SK
Kinoshita
K
K
Koiso
H
H
Koppenburg
P
P
Korpar
S
S
Krizan
P
P
Krokovny
P
P
Kumar
S
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Kuzmin
A
A
Lange
J S
JS
Leder
G
G
Lee
S H
SH
Lesiak
T
T
Lin
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Liventsev
D
D
MacNaughton
J
J
Majumder
G
G
Mandl
F
F
Marlow
D
D
Matsumoto
T
T
Michizono
S
S
Mimashi
T
T
Mitaroff
W
W
Miyabayashi
K
K
Miyake
H
H
Mohapatra
D
D
Moloney
G R
GR
Nagamine
T
T
Nagasaka
Y
Y
Nakadaira
T
T
Nakamura
T T
TT
Nakao
M
M
Natkaniec
Z
Z
Nishida
S
S
Nitoh
O
O
Nozaki
T
T
Ogawa
S
S
Ogawa
Y
Y
Ohmi
K
K
Ohnishi
Y
Y
Ohshima
T
T
Ohuchi
N
N
Oide
K
K
Okabe
T
T
Okuno
S
S
Ostrowicz
W
W
Ozaki
H
H
Palka
H
H
Park
H
H
Parslow
N
N
Piilonen
L E
LE
Sagawa
H
H
Saitoh
S
S
Sakai
Y
Y
Sarangi
T R
TR
Satapathy
M
M
Satpathy
A
A
Schneider
O
O
Schwartz
A J
AJ
Semenov
S
S
Senyo
K
K
Seuster
R
R
Sevior
M E
ME
Shibuya
H
H
Shidara
T
T
Shwartz
B
B
Sidorov
V
V
Soni
N
N
Stanic
S
S
Staric
M
M
Sugiyama
A
A
Sumiyoshi
T
T
Suzuki
S
S
Takasaki
F
F
Tamai
K
K
Tamura
N
N
Tanaka
M
M
Tawada
M
M
Taylor
G N
GN
Teramoto
Y
Y
Tomura
T
T
Trabelsi
K
K
Tsukamoto
T
T
Uehara
S
S
Ueno
K
K
Unno
Y
Y
Uno
S
S
Varner
G
G
Varvell
K E
KE
Wang
C C
CC
Wang
C H
CH
Wang
J G
JG
Watanabe
Y
Y
Won
E
E
Yabsley
B D
BD
Yamada
Y
Y
Yamaguchi
A
A
Yamashita
Y
Y
Yanai
H
H
Yang
Heyoung
H
Ying
J
J
Yoshida
M
M
Zhang
C C
CC
Zhang
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Zontar
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D