Author:
Di Zun-Yan,Wang Zhi-Gang,Yu Guo-Liang
Abstract
Abstract
In this article, we assume that there exist the pseudoscalar
D
D
¯
s
0
*
(
2317
)
and
D
*
D
¯
s
1
*
(
2460
)
molecular states Z1,2 and construct the color singlet-singlet molecule-type interpolating currents to study their masses with the QCD sum rules. In calculations, we consider the contributions of the vacuum condensates up to dimension-10 and use the formula
μ
=
M
X
/
Y
/
Z
2
−
(
2
M
c
)
2
to determine the energy scales of the QCD spectral densities. The numerical results,
M
Z
1
=
4.61
−
0.08
+
0.11
GeV
and
M
Z
2
=
4.60
−
0.06
+
0.07
GeV
, which lie above the
D
D
¯
s
0
*
(
2317
)
and
D
*
D
¯
s
1
*
(
2460
)
thresholds respectively, indicate that the
D
D
¯
s
0
*
(
2317
)
and
D
*
D
¯
s
1
*
(
2460
)
are difficult to form bound state molecular states, the Z1,2 are probably resonance states.
Subject
Physics and Astronomy (miscellaneous)
Cited by
8 articles.
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