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Chen, YH; Dai, LY; Guo, FK; Kubis, B4,5
Nature of the Y(4260): A light-quark perspective
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordFINAL-STATE INTERACTIONS DECAY AMPLITUDE EQUATIONS
AbstractThe Y(4260) has been one of the most puzzling pieces among the so-called XYZ states. In this paper, we try to gain insights into the structure of the Y(4260) from the light-quark perspective. We study the dipion invariant mass spectrum of the e(+) e(-) -> Y(4260) -> J/psi pi(+)pi(-) process and the ratio of the cross sections sigma(e(+)e(-) -> J/psi K+ K-)/sigma(e(+)e(-) -> J/psi pi(+)pi(-)). In particular, we consider the effects of different light-quark SU(3) eigenstates inside the Y(4260). The strong pion-pion final-state interactions as well as the K (K) over bar coupled channel in the S-wave are taken into account in a model-independent way using dispersion theory. We find that the SU(3) octet state plays a significant role in these transitions, implying that the Y(4260) contains a large light-quark component. Our findings suggest that the Y(4260) is neither a hybrid nor a conventional charmonium state, and they are consistent with the Y(4260) having a sizeable (D) over barD(1) component which, however, is not completely dominant.
2019
ISSN2470-0010
Volume99Issue:7Pages:74016
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.99.074016
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23450
CollectionSCI期刊论文
Affiliation1.Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China
2.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China
3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
5.Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany
6.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
Recommended Citation
GB/T 7714
Chen, YH,Dai, LY,Guo, FK,et al. Nature of the Y(4260): A light-quark perspective[J]. PHYSICAL REVIEW D,2019,99(7):74016.
APA Chen, YH,Dai, LY,Guo, FK,&Kubis, B.(2019).Nature of the Y(4260): A light-quark perspective.PHYSICAL REVIEW D,99(7),74016.
MLA Chen, YH,et al."Nature of the Y(4260): A light-quark perspective".PHYSICAL REVIEW D 99.7(2019):74016.
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