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J~P assignments of Λ_c~+ baryons

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【作者】 陈兵王登霞张爱林

【Author】 CHEN Bing()1;1) WANG Deng-Xia()1 ZHANG Ai-Lin()1,2;2) 1 (Department of Physics, Shanghai University, Shanghai 200444, China) 2 (Theoretical Physics Center for Science Facilities (TPCSF), CAS, Beijing 100049, China)

【机构】 Department of Physics, Shanghai UniversityTheoretical Physics Center for Science Facilities (TPCSF), CAS

【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-.

【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-.

【关键词】 diquarkflux tube modelcharmed baryons
【Key words】 diquarkflux tube modelcharmed baryons
【基金】 Supported by National Natural Science Foundation of China (10775093);Shanghai Leading Academic Discipline Project(S30105)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2009年12期
  • 【分类号】O572.34
  • 【被引频次】1
  • 【下载频次】13
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