Abstract
AbstractThree neutral resonances $$\Xi _c(2923)^0$$
Ξ
c
(
2923
)
0
, $$\Xi _c(2939)^0$$
Ξ
c
(
2939
)
0
, and $$\Xi _c(2965)^0$$
Ξ
c
(
2965
)
0
have been observed in the $$\Lambda _c^+ K^-$$
Λ
c
+
K
-
mass spectrum by the LHCb Collaboration. Given the $$\Xi _c$$
Ξ
c
and $$\Xi _c^\prime $$
Ξ
c
′
mass spectra predicted by the constituent quark models, these three resonances are tentatively treated as the $$\lambda $$
λ
-mode $$\Xi _c(2S)$$
Ξ
c
(
2
S
)
, $$\Xi _c^\prime (2S)$$
Ξ
c
′
(
2
S
)
, $$\Xi _c^{\prime *}(2S)$$
Ξ
c
′
∗
(
2
S
)
, and $$\Xi _c^\prime (1P)$$
Ξ
c
′
(
1
P
)
states, and their strong decay behaviors are calculated within the $$^3P_0$$
3
P
0
model. Our results indicate that the $$\Xi _c(2923)^0$$
Ξ
c
(
2923
)
0
and $$\Xi _c(2939)^0$$
Ξ
c
(
2939
)
0
can be clarified into the $$J^P=3/2^-$$
J
P
=
3
/
2
-
and $$5/2^-$$
5
/
2
-
$$\Xi _c^\prime (1P)$$
Ξ
c
′
(
1
P
)
states respectively, and the $$\Xi _c(2965)^0$$
Ξ
c
(
2965
)
0
can be regarded as the $$J^P=1/2^+$$
J
P
=
1
/
2
+
$$\Xi _c^\prime (2S)$$
Ξ
c
′
(
2
S
)
state. Also, we suggest that the previous observed $$\Xi _c(2930)$$
Ξ
c
(
2930
)
may be the overlap of two structures $$\Xi _c(2923)$$
Ξ
c
(
2923
)
and $$\Xi _c(2939)$$
Ξ
c
(
2939
)
, and the $$\Xi _c(2970)$$
Ξ
c
(
2970
)
should be the same state as $$\Xi _c(2965)$$
Ξ
c
(
2965
)
. Other theoretical information on the missing $$\Xi _c(2S)$$
Ξ
c
(
2
S
)
, $$\Xi _c^{\prime *}(2S)$$
Ξ
c
′
∗
(
2
S
)
, and $$\Xi _c^\prime (1P)$$
Ξ
c
′
(
1
P
)
states may be helpful for future experimental searches.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference53 articles.
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2. H.M. Yang, H.X. Chen, Q. Mao, Identifying the $$\Xi _c^0$$ baryons observed by LHCb as $$P$$-wave $$\Xi _c^\prime $$ baryons. arXiv:2004.00531
3. M. Tanabashi et al., (Particle Data Group), Review of Particle Physics. Phys. Rev. D 98, 030001 (2018)
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