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arXiv 0911.3541hep-phhep-latnucl-th
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微扰论中的三夸克静势

The three-quark static potential in perturbation theory

Nora Brambilla, Jacopo Ghiglieri, Antonio Vairo

摘要:

我们在QCD微扰理论中研究了三夸克静态势。一个完整的下一个领先的顺序进行计算的单线态,八位组和十重态通道和潜在的指数被证明。计算八位字节表示的混合。在次-首序下,确定了库仑规范中产生三体力的图的子集,并计算了其对势的贡献。结合从夸克-反夸克静势中提取的二体力的贡献,我们得到了色单态通道中完整的次次领先阶三夸克静势.

英文摘要:

We study the three-quark static potential in perturbation theory in QCD. A complete next-to-leading order calculation is performed in the singlet, octets and decuplet channels and the potential exponentiation is demonstrated. The mixing of the octet representations is calculated. At next-to-next-to-leading order, the subset of diagrams producing three-body forces is identified in Coulomb gauge and its contribution to the potential calculated. Combining it with the contribution of the two-body forces, which may be extracted from the quark-antiquark static potential, we obtain the complete next-to-next-to-leading order three-quark static potential in the colour-singlet channel.

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