Scalar Tetraquark Currents With Application to the QCD Sum Rule
Scalar Tetraquark Currents With Application to the QCD Sum Rule
复制标题
DOI：
10.1142/s0217732308029095
复制
发表时间：
2008-11
期刊：
影响因子：
--
通讯作者：
Hua-Xing Chen;A. Hosaka;Shi-Lin Zhu
中科院分区：
文献类型：
--
作者：
Hua-Xing Chen;A. Hosaka;Shi-Lin Zhu
我们研究了QCD求和规则中的轻标量介子。我们构造了双夸克-反双夸克电流$(Qq)(\bar q\bar q)$和介子-介子电流$(Bar Qq)(\bar qq)$。我们发现这两种情况下都存在五个独立的流，并推导出它们之间的关系。对于介子-介子流，色单态对或色八重态对的乘积形成五个独立的流。然而，它们可以相互关联，并且这些关系是派生出来的。我们得到了与实验一致的轻标量介子质量。
We study the light scalar mesons in the QCD sum rule. We construct both the diquark-antidiquark currents $(qq)(\bar q \bar q)$ and the meson-meson currents $(\bar qq)(\bar qq)$. We find that there are five independent currents for both cases, and derive the relations between them. For the meson-meson currents, five independent currents are formed by products of color singlet $\bar q q$ pairs or color octet pairs. However, they can be related to each other, and the relations are derived. We obtain the masses of the light scalar mesons which are consistent with the experiments.