164 research outputs found
Is the exotic a bound state?
Stimulated by the recent observation of the exotic state by D0
Collaboration, we study the four-quark system with quantum
numbers in the framework of chiral quark model. Two structures,
diquark-antidiquark and meson-meson, with all possible color configurations are
investigated by using Gaussian expansion method. The results show that energies
of the tetraquark states with diquark-antiquark structure are too high to the
candidate of , and no molecular structure can be formed in our
calculations. The calculation is also extended to the four-quark system
and the same results as that of are
obtained.Comment: 5 pages, 1 figur
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