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Jing, Hao-Jie; Sakai, Shuntaro; Guo, Feng-Kun; Zou, Bing-Song
Triangle singularities in J/psi -> eta pi(0)phi and pi(0)pi(0)phi
Source PublicationPHYSICAL REVIEW D
AbstractThe 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.
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.[Jing, Hao-Jie
2.Sakai, Shuntaro
3.Guo, Feng-Kun
4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
6.Cent S Univ, Changsha 410083, Hunan, Peoples R China
Recommended Citation
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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