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arXiv 1105.3487hep-th
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从N=4规范理论到N=2共形QCD:纯量复合算子的三圈混合

From N=4 gauge theory to N=2 conformal QCD: three-loop mixing of scalar composite operators

Elli Pomoni, Christoph Sieg

摘要:

本文导出了N=2的超共形三圈双规范理论的标量复合算符闭子扇区中的平面伸缩算符。通过调节两个规范耦合的比值,我们在N=4 SYM理论的Z_2轨道和N=2超共形QCD之间进行了插值。我们发现zeta(3)的贡献在三个循环消失时,理论是在轨道点。它们对自旋链图中单个标量激发的色散关系的虚贡献负责。这指向一个解释的个人标量激发作为有效的,而不是作为基本的磁振子。我们认为,基本的激发应该与某些费米子和协变衍生物,并在各自的子部门的可积性应坚持至少两个循环。

英文摘要:

We derive the planar dilatation operator in the closed subsector of scalar composite operators of an N=2 superconformal quiver gauge theory to three loops. By tuning the ratio of its two gauge couplings we interpolate between a Z_2 orbifold of N=4 SYM theory and N=2 superconformal QCD. We find zeta(3) contributions at three loops that disappear when the theory is at the orbifold point. They are responsible for imaginary contributions to the dispersion relation of a single scalar excitation in the spin-chain picture. This points towards an interpretation of the individual scalar excitations as effective rather than as elementary magnons. We argue that the elementary excitations should be associated with certain fermions and covariant derivatives, and that integrability in the respective subsectors should persist at least to two loops.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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