Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi
文献类型：期刊论文
| 作者 | Jing, Hao-Jie; Sakai, Shuntaro; Guo, Feng-Kun ; Zou, Bing-Song
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 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 |
| 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.Sakai, Shuntaro 2.Cent S Univ, Changsha 410083, Hunan, Peoples R China 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, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China 5.Guo, Feng-Kun 6.[Jing, Hao-Jie |
| 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. |
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来源：理论物理研究所
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