Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi

doi:10.1103/PhysRevD.100.114010

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	Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi
	Jing, Hao-Jie ; Sakai, Shuntaro ; Guo, Feng-Kun ; Zou, Bing-Song
刊名	PHYSICAL REVIEW D
	2019
卷号	100 期号:11 页码:114010
关键词	CHIRAL DYNAMICS MESON DECAYS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.100.114010
英文摘要	The BESIII Collaboration recently reported the observation of the a(0) (980)(0) - f(0) (980) mixing in the isospin-breaking decay J/psi -> eta pi(0)phi. In the Dalitz plot for that decay with the ti reconstructed from two photons, there is a band around 1.4 GeV on the pi(0)phi distribution. In general, this peak can be due to a resonance or a kinematic effect. In this paper, we study the effects of a set of K*K (K) over bar triangle diagrams and show that due to triangle singularities such diagrams can lead to a peak around 1.4 GeV in the pi(0)phi invariant mass distribution, which is a model-independent conclusion. The Dalitz plot induced by such a mechanism has a feature consistent with the BESIII observation; namely, events along the band accumulate at both ends close to the Dalitz plot boundary. The effects of the same mechanism on the J/psi -> pi(0)pi(0)phi and J/psi -> eta pi(K+K-)-K-0 decays are also investigated. We suggest to take more data for the J/psi ->eta pi(0)phi -> eta pi(K+K-)-K-0 and check whether the structure around 1.4 GeV persists for the K+K- invariant mass away from the phi mass region. This is crucial for understanding whether the band is due to triangle singularities or due to a resonance. Were it the latter, the band should remain, while it would not if it is due to the former.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27123]
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.Guo, Feng-Kun 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China 3.[Jing, Hao-Jie 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.Cent S Univ, Changsha 410083, Hunan, Peoples R China 6.Sakai, Shuntaro
推荐引用方式 GB/T 7714	Jing, Hao-Jie,Sakai, Shuntaro,Guo, Feng-Kun,et al. Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi[J]. PHYSICAL REVIEW D,2019,100(11):114010.
APA	Jing, Hao-Jie,Sakai, Shuntaro,Guo, Feng-Kun,&Zou, Bing-Song.(2019).Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi.PHYSICAL REVIEW D,100(11),114010.
MLA	Jing, Hao-Jie,et al."Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi".PHYSICAL REVIEW D 100.11(2019):114010.