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Diquark and light four-quark states
Zhang, A; 黄涛(理); Huang, T; Steele, TG
Source PublicationPHYSICAL REVIEW D
Corresponding AuthorShanghai Univ, Dept Phys, Shanghai 200444, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada
AbstractFour-quark states with different internal clusters are discussed within the constituent quark model. It is pointed out that the diquark concept is not meaningful in the construction of a tetraquark interpolating current in the QCD sum-rule approach, and hence existing sum-rule studies of four-quark states are incomplete. An updated QCD sum-rule determination of the properties of diquark clusters is then used as input for the constituent quark model to obtain the masses of light 0(++) tetraquark states (i.e. a bound state of two diquark clusters). The results support the identification of sigma(600), f(0)(980), and a(0)(980) as the 0(++) light tetraquark states, and seem to be inconsistent with the tetraquark state interpretation of the new BES observations of the near-threshold p (p) over bar enhancements, X(1835) and X(1812), with the possible exception that X(1576) may be an exotic first orbital excitation of f(0)(980) or a(0)(980).
Subject AreaAstronomy & Astrophysics; Physics
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000249155700056
ADS Bibcode2007PhRvD..76c6004Z
ADS URLhttps://ui.adsabs.harvard.edu/abs/2007PhRvD..76c6004Z
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2007PhRvD..76c6004Z/citations
Citation statistics
Cited Times:48 [INSPIRE]
Cited Times:41 [ADS]
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Zhang, A,Huang T,Huang, T,et al. Diquark and light four-quark states[J]. PHYSICAL REVIEW D,2007,76(3):36004.
APA Zhang, A,黄涛,Huang, T,&Steele, TG.(2007).Diquark and light four-quark states.PHYSICAL REVIEW D,76(3),36004.
MLA Zhang, A,et al."Diquark and light four-quark states".PHYSICAL REVIEW D 76.3(2007):36004.
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