Observation of a threshold enhancement in the plambda invariant-mass spectrum.
Ablikim
M
M
Institute of High Energy Physics, Beijing 100039, People's Republic of China.
Bai
J Z
JZ
Ban
Y
Y
Bian
J G
JG
Cai
X
X
Chang
J F
JF
Chen
H F
HF
Chen
H S
HS
Chen
H X
HX
Chen
J C
JC
Chen
Jin
J
Chen
Jun
J
Chen
M L
ML
Chen
Y B
YB
Chi
S P
SP
Chu
Y P
YP
Cui
X Z
XZ
Dai
H L
HL
Dai
Y S
YS
Deng
Z Y
ZY
Dong
L Y
LY
Du
S X
SX
Du
Z Z
ZZ
Fang
J
J
Fang
S S
SS
Fu
C D
CD
Fu
H Y
HY
Gao
C S
CS
Gao
Y N
YN
Gong
M Y
MY
Gong
W X
WX
Gu
S D
SD
Guo
Y N
YN
Guo
Y Q
YQ
Guo
Z J
ZJ
Harris
F A
FA
He
K L
KL
He
M
M
He
X
X
Heng
Y K
YK
Hu
H M
HM
Hu
T
T
Huang
G S
GS
Huang
L
L
Huang
X P
XP
Ji
X B
XB
Jia
Q Y
QY
Jiang
C H
CH
Jiang
X S
XS
Jin
D P
DP
Jin
S
S
Jin
Y
Y
Lai
Y F
YF
Li
F
F
Li
G
G
Li
H H
HH
Li
J
J
Li
J C
JC
Li
Q J
QJ
Li
R B
RB
Li
R Y
RY
Li
S M
SM
Li
W G
WG
Li
X L
XL
Li
X Q
XQ
Li
X S
XS
Liang
Y F
YF
Liao
H B
HB
Liu
C X
CX
Liu
F
F
Liu
Fang
F
Liu
H M
HM
Liu
J B
JB
Liu
J P
JP
Liu
R G
RG
Liu
Z A
ZA
Liu
Z X
ZX
Lu
F
F
Lu
G R
GR
Lu
J G
JG
Luo
C L
CL
Luo
X L
XL
Ma
F C
FC
Ma
J M
JM
Ma
L L
LL
Ma
Q M
QM
Ma
X Y
XY
Mao
Z P
ZP
Mo
X H
XH
Nie
J
J
Nie
Z D
ZD
Olsen
S L
SL
Peng
H P
HP
Qi
N D
ND
Qian
C D
CD
Qin
H
H
Qiu
J F
JF
Ren
Z Y
ZY
Rong
G
G
Shan
L Y
LY
Shang
L
L
Shen
D L
DL
Shen
X Y
XY
Sheng
H Y
HY
Shi
F
F
Shi
X
X
Sun
H S
HS
Sun
S S
SS
Sun
Y Z
YZ
Sun
Z J
ZJ
Tang
X
X
Tao
N
N
Tian
Y R
YR
Tong
G L
GL
Varner
G S
GS
Wang
D Y
DY
Wang
J X
JX
Wang
J Z
JZ
Wang
K
K
Wang
L
L
Wang
L S
LS
Wang
M
M
Wang
P
P
Wang
P L
PL
Wang
S Z
SZ
Wang
W F
WF
Wang
Y F
YF
Wang
Zhe
Z
Wang
Z
Z
Wang
Zheng
Z
Wang
Z Y
ZY
Wei
C L
CL
Wei
D H
DH
Wu
N
N
Wu
Y M
YM
Xia
X M
XM
Xie
X X
XX
Xin
B
B
Xu
G F
GF
Xu
H
H
Xu
Y
Y
Xue
S T
ST
Yan
M L
ML
Yang
F
F
Yang
H X
HX
Yang
J
J
Yang
S D
SD
Yang
Y X
YX
Ye
M
M
Ye
M H
MH
Ye
Y X
YX
Yi
L H
LH
Yi
Z Y
ZY
Yu
C S
CS
Yu
G W
GW
Yuan
C Z
CZ
Yuan
J M
JM
Yuan
Y
Y
Yue
Q
Q
Zang
S L
SL
Zeng
Yu
Y
Zeng
Y
Y
Zhang
B X
BX
Zhang
B Y
BY
Zhang
C C
CC
Zhang
D H
DH
Zhang
H Y
HY
Zhang
J
J
Zhang
J Y
JY
Zhang
J W
JW
Zhang
L S
LS
Zhang
Q J
QJ
Zhang
S Q
SQ
Zhang
X M
XM
Zhang
X Y
XY
Zhang
Y J
YJ
Zhang
Y Y
YY
Zhang
Yiyun
Y
Zhang
Z P
ZP
Zhang
Z Q
ZQ
Zhao
D X
DX
Zhao
J B
JB
Zhao
J W
JW
Zhao
M G
MG
Zhao
P P
PP
Zhao
W R
WR
Zhao
X J
XJ
Zhao
Y B
YB
Zhao
Z G
ZG
Zheng
H Q
HQ
Zheng
J P
JP
Zheng
L S
LS
Zheng
Z P
ZP
Zhong
X C
XC
Zhou
B Q
BQ
Zhou
G M
GM
Zhou
L
L
Zhou
N F
NF
Zhu
K J
KJ
Zhu
Q M
QM
Zhu
Y C
YC
Zhu
Y S
YS
Zhu
Yingchun
Y
Zhu
Z A
ZA
Zhuang
B A
BA
Zou
B S
BS