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arXiv 1202.4169hep-ph
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通量管模型中低于1 GeV的轻标量介子的动力学研究

Dynamical study of the light scalar mesons below 1 GeV in a flux-tube model

C. R. Deng, J. L. Ping, F. Wang

摘要:

在通量管模型框架下,用多体禁闭代替加性两体禁闭,研究了能量低于1GeV的轻标量介子的四夸克态。计算结果表明,轻标量介子、$σ$、$κ$可以很好地容纳在双夸克-反双夸克四夸克模型中,它们可能是色限制共振. $[ud][\bar{u}\bar{d}]$第一径向激发态的质量为1019 MeV,与$f_0(980)$的质量接近。而$a_0(980)$不能适用于这种解释。

英文摘要:

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, $σ$, $κ$ 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.

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