https://doi.org/10.1140/epjc/s10052-007-0471-8
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
* e-mail: liuc@mail.itp.ac.cn
Received:
2
September
2007
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
