Masses of heavy tetraquarks in the relativistic quark model
Masses of heavy tetraquarks in the relativistic quark model
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DOI：
10.1016/j.physletb.2006.01.026
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发表时间：
2005-12
影响因子：
4.4
通讯作者：
D. Ebert;R. Faustov;R. Faustov;V. Galkin;V. Galkin
中科院分区：
文献类型：
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作者：
D. Ebert;R. Faustov;R. Faustov;V. Galkin;V. Galkin
在相对论夸克模型的框架下计算了具有隐藏魅力和底部的重四夸克的质量。四夸克被认为是重轻双夸克和反双夸克的束缚态。重轻双夸克中的轻夸克完全是相对论性的。通过根据双夸克波函数计算双夸克-胶子形状因子来考虑双夸克的内部结构。讨论了高于开放魅力阈值的类魅力态的新实验数据。所得结果表明X(3872)可能是具有隐藏魅力的四夸克态。发现具有隐藏底部的基态四夸克的质量低于开放底部阈值。
The masses of heavy tetraquarks with hidden charm and bottom are calculated in the framework of the relativistic quark model. The tetraquark is considered as the bound state of a heavy–light diquark and antidiquark. The light quark in a heavy–light diquark is treated completely relativistically. The internal structure of the diquark is taken into account by calculating the diquark–gluon form factor in terms of the diquark wave functions. New experimental data on charmonium-like states above open charm threshold are discussed. The obtained results indicate that the X(3872) can be the tetraquark state with hidden charm. The masses of ground state tetraquarks with hidden bottom are found to be below the open bottom threshold.