Exploring Possible Triangle Singularities in the Xi(-)(b) -> K- J/psi Lambda Decay

doi:10.3390/sym12101611

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	Exploring Possible Triangle Singularities in the Xi(-)(b) -> K- J/psi Lambda Decay
	Shen, Chao-Wei ; Jing, Hao-Jie ; Guo, Feng-Kun ; Wu, Jia-Jun
刊名	SYMMETRY-BASEL
	2020
卷号	12 期号:10 页码:1611
关键词	RESONANCE
DOI	10.3390/sym12101611
英文摘要	We analyze possible singularities in the J/psi Lambda invariant mass distribution of the Xi(-)(b) -> K- J/psi Lambda process via triangle loop diagrams. Triangle singularities in the physical region are found in 18 different triangle loop diagrams. Among those with Xi-charmonium-L intermediate states, the one from the chi(c1)Xi(2120)Lambda loop, which is located around 4628 MeV, is found the most likely to cause observable effects. One needs S- and P-waves in chi(c1)Lambda and J/psi Lambda systems, respectively, when the quantum numbers of these systems are 1/2(+) or 3/2(+). When the quantum numbers of the Xi(2120) are J(P) = 1/2(+), 1/2 or 3/2(+), the peak structure should be sharper than the other J(P) choices. This suggests that although the whole strength is unknown, we should pay attention to the contributions from the Xi-charmonium-L triangle diagram if structures are observed in the J/psi Lambda invariant mass spectrum experimentally. In addition, a few triangle diagrams with the D*(s1) (2700) as one of the intermediate particles can also produce singularities in the J/psi Lambda distribution, but at higher energies above 4.9 GeV.
学科主题	Science & Technology - Other Topics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27250]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Shen, Chao-Wei 2.Jing, Hao-Jie 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Guo, Feng-Kun 6.[Jing, Hao-Jie
推荐引用方式 GB/T 7714	Shen, Chao-Wei,Jing, Hao-Jie,Guo, Feng-Kun,et al. Exploring Possible Triangle Singularities in the Xi(-)(b) -> K- J/psi Lambda Decay[J]. SYMMETRY-BASEL,2020,12(10):1611.
APA	Shen, Chao-Wei,Jing, Hao-Jie,Guo, Feng-Kun,&Wu, Jia-Jun.(2020).Exploring Possible Triangle Singularities in the Xi(-)(b) -> K- J/psi Lambda Decay.SYMMETRY-BASEL,12(10),1611.
MLA	Shen, Chao-Wei,et al."Exploring Possible Triangle Singularities in the Xi(-)(b) -> K- J/psi Lambda Decay".SYMMETRY-BASEL 12.10(2020):1611.