Regular Article - Theoretical Physics
Baryonium, tetraquark state and glueball in large-Nc QCD
Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing, 100080, P.R. China
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Revised: 14 October 2007
Published online: 4 December 2007
From the large- QCD point of view, baryonia, tetraquark states, hybrids, and glueballs are studied. The existence of these states is argued for. They are constructed from baryons. In large- QCD, a baryonium is always identical to a glueball with valence gluons. The ground state glueball has a mass of about 2450 MeV. is identified as the lowest glueball. The lowest four-quark nonet should be , , and . Combining with the heavy quark effective theory, spectra of heavy baryonia and heavy tetraquark states are predicted. corrections are discussed.
© Springer-Verlag , 2008