https://doi.org/10.1140/epja/i2015-15082-3
Regular Article - Theoretical Physics
Investigation of ΛQ and ΞQ baryons in the heavy quark-light diquark picture
1
Department of Physics, Anyang Normal University, 455000, Anyang, China
2
Department of Physics, Shanghai University, 200444, Shanghai, China
* e-mail: theophys@163.com
Received:
27
April
2015
Revised:
15
June
2015
Accepted:
24
June
2015
Published online:
13
July
2015
We apply a new mass formula which is derived analytically in the relativistic flux tube model to the mass spectra of Λ
Q
and Ξ
Q
(Q = c or b quark) baryons. To this end, the heavy quark-light diquark picture is employed. We find that all masses of the available Λ
Q
and Ξ
Q
states can be understood well. The assignments to these states do not appear to contradict the strong decay properties. Λ
c
(2760)+ and Ξ
c
(2980) are assigned to the first radial excitations with J
P
= 1/2+. Λ
c
(2940)+ and Ξ
c
(3123) might be the 2P states. The Λ
c
(2880)+ and Ξ
c(3080) are the good 1D candidates with J
P
= 5/2+. Λ
c
(3055) is likely to be a 1D state with J
P
=3/2+. Λ
b
(5912)0 and Λ
b
(5920)0 favor the 1P assignments with J
P
= 1/2− and 3/2−, respectively. We propose a search for the 
state which can help to distinguish the diquark and three-body schemes.
© SIF, Springer-Verlag Berlin Heidelberg, 2015
