Glueball physics in QCD

The Abelian decomposition of QCD which decomposes the gluons to the color neutral binding gluons and the colored valence gluons shows that QCD can be viewed as the restricted QCD (RCD) made of the binding gluons which has the valence gluons as colored source, and simplifies the QCD dynamics greatly....

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2015-06, Vol.91 (11), Article 114020
Main Authors: Cho, Y. M., Pham, X. Y., Zhang, Pengming, Xie, Ju-Jun, Zou, Li-Ping
Format: Article
Language:English
Subjects:
Binding
Channels
Decomposition
Gluons
Hadrons
Mathematical models
Quantum chromodynamics
Quarks
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Summary:The Abelian decomposition of QCD which decomposes the gluons to the color neutral binding gluons and the colored valence gluons shows that QCD can be viewed as the restricted QCD (RCD) made of the binding gluons which has the valence gluons as colored source, and simplifies the QCD dynamics greatly. In particular, it tells that the gauge covariant valence gluons can be treated as the constituents of hadrons, and generalizes the quark model to the quark and valence gluon model. So it provides a comprehensive picture of glueballs and their mixing with quarkoniums, and predicts new hybrid hadrons made of quarks and valence gluons. We discuss how these predictions could be confirmed experimentally. In particular we present a systematic search for the ground state glueballs and their mixing with quarkoniums below 2 GeV in 0 super(++), 2 super(++), and 0 super(-+) channels within the framework of QCD, and predict the relative branching ratios of the radiative decay of [psi] to the physical states.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.91.114020