Evidence for a vector charmoniumlike state in e + e − → D + s D ∗ s 2 ( 2573 ) − + c . c .
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We report the measurement of
e
+
e
−
→
D
+
s
D
∗
s
2
(
2573
)
−
+
c
.
c
.
via initial-state radiation using a data sample of an integrated luminosity of
921.9
fb
−
1
collected with the Belle detector at the
Υ
(
4
S
)
and nearby. We find evidence for an enhancement with a
3.4
σ
significance in the invariant mass of
D
+
s
D
∗
s
2
(
2573
)
−
+
c
.
c
.
The measured mass and width are
(
4619.8
+
8.9
−
8.0
(
stat
.
)
±
2.3
(
syst
.
)
)
MeV
/
c
2
and
(
47.0
+
31.3
−
14.8
(
stat
.
)
±
4.6
(
syst
.
)
)
MeV
, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmoniumlike state at
4626
MeV
/
c
2
recently reported by Belle in
e
+
e
−
→
D
+
s
D
s
1
(
2536
)
−
+
c
.
c
.
The product of the
e
+
e
−
→
D
+
s
D
∗
s
2
(
2573
)
−
+
c
.
c
.
cross section and the branching fraction of
D
∗
s
2
(
2573
)
−
→
¯
D
0
K
−
is measured from
D
+
s
D
∗
s
2
(
2573
)
−
threshold to 5.6 GeV.
Description
Only IISERM authors are available in the record.
Keywords
Citation
Physical Review D, 101(9).