J~P assignments of Λ_c~+ baryons

【摘要】 The "good" diquark is employed to study Λ+c baryons within a mass loaded flux tube model. The study indicates that all Λ+c baryons candidates in the 2008 review by the Particle Data Group (PDG) are well described in the mass loaded flux model. The quantum numbers JP of these Λc+ candidates are assigned. If Λc(2765)+ is an orbitally excited Λc+ , it is likely the JP = 23+ one. If Λc(2765)+ is an orbitally excited Σc, there ought to be another JP = 23+ Λc+ with mass ≈ 2770 MeV. In the model, there exists no JP = 21+ Λc+ (≈ 2700) predicted in existing literature. Λc(2940)+ is very possible the orbitally excited baryon with JP = 25-.更多还原

【Abstract】 The "good" diquark is employed to study Λ+c baryons within a mass loaded flux tube model. The study indicates that all Λ+c baryons candidates in the 2008 review by the Particle Data Group (PDG) are well described in the mass loaded flux model. The quantum numbers JP of these Λc+ candidates are assigned. If Λc(2765)+ is an orbitally excited Λc+ , it is likely the JP = 23+ one. If Λc(2765)+ is an orbitally excited Σc, there ought to be another JP = 23+ Λc+ with mass ≈ 2770 MeV. In the model, there exists no JP = 21+ Λc+ (≈ 2700) predicted in existing literature. Λc(2940)+ is very possible the orbitally excited baryon with JP = 25-.更多还原