Abstract
Abstract
We investigate properties of the new scalar resonances
T
cs
0
a
(
2900
)
++
and
T
cs
0
a
(
2900
)
0
, which were recently reported by the LHCb collaboration. These states were observed as resonant structures in
D
s
+
π
+
and
D
s
+
π
−
invariant mass distributions in B
+ meson decays. We argue that
T
cs
0
a
(
2900
)
++
and
T
cs
0
a
(
2900
)
0
may be modeled as molecules
++
=
D
s
∗
+
ρ
+
and
0
=
D
s
∗
+
ρ
−
of conventional vector mesons, respectively. The mass m and current coupling f of the molecule
++
are calculated using a two-point sum rule method. The sum rule analysis is performed by taking into account vacuum condensates up to dimension 8. The obtained result for the mass, m = (2917 ± 135) MeV, permits us to consider the molecule
++
as one of the possible models of the resonance
T
cs
0
a
(
2900
)
++
. Because the second structure
T
cs
0
a
(
2900
)
0
is isospin partner of the doubly charged state, it should have a mass close to m.
Subject
Nuclear and High Energy Physics
Cited by
12 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献