C. R. Deng, J. L. Ping, F. Wang
The light scalar mesons below 1 GeV as tetraquark states are studied in the
framework of the flux-tube model, the multi-body confinement instead of the
additive two-body confinement is used. From the calculated results, we find
that the light scalar mesons, $\sigma$, $\kappa$ could be well accommodated in
the diquark-antidiquark tetraquark picture in the flux-tube model and they
could be color confinement resonances. The mass of the first radial excited
state of $[ud][\bar{u}\bar{d}]$ is 1019 MeV, which is close to the mass of
$f_0(980)$. Whereas $a_0(980)$ can not be fitted in this interpretation.
View original:
http://arxiv.org/abs/1202.4169
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