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arXiv 1704.03047hep-th
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N=1超对称QCD中的非阿贝尔字符串

Non-Abelian strings in N=1 supersymmetric QCD

E. Ievlev, A. Yung

摘要:

在N=2的(3+1)维超对称QCD中,非阿贝尔通量管(弦)得到了很好的研究。除了平移零模式,他们也有取向模与旋转的通量内的非阿贝尔群。取向模的动力学由生活在非阿贝尔弦的世界片上的二维CP(N-1)模型描述。本文考虑了具有U(N)规范群和N_f=N夸克味的N=2超对称QCD的形变,其中伴随物质的质量项为$μ$。在大$μ$的极限下,理论流到N=1的超对称QCD。我们研究了非阿贝尔弦在这个极限下的解,并导出了弦世界单的有效理论。该理论的玻色子部分仍然由CP(N-1)模型给出,但与四维体理论的尺度相比,其尺度是指数级小的,而N=2的情况下,这些尺度是相等的。我们还研究了世界片理论中的费米子部分。变形后的非阿贝尔弦不再是BPS,我们表明,费米超取向零模都被解除。这使得我们在N=1 QCD的极限下,得到弦世界片上的纯玻色子CP(N-1)模型。我们还讨论了在大$μ$的限制单极子会发生什么。

英文摘要:

Non-Abelian flux tubes (strings) are well studied in N=2 supersymmetric QCD in (3+1) dimensions. In addition to translational zero modes they have also orientational moduli associated with rotations of their fluxes inside a non-Abelian group. The dynamics of the orientational moduli is described by the two dimensional CP(N-1) model living on the world sheet of the non-Abelian string. In this paper we consider a deformation of N=2 supersymmetric QCD with the U(N) gauge group and N_f=N quark flavors with a mass term $μ$ of the adjoint matter. In the limit of large $μ$ the theory flows to an N=1 supersymmetric QCD. We study the solution for the non-Abelian string in this limit and derive an effective theory on the string world sheet. The bosonic sector of this theory is still given by the CP(N-1) model but its scale is exponentially small as compared to the scale of the four dimensional bulk theory in contrast to the N=2 case where these scales are equal. We study also the fermionic sector of the world sheet theory. Upon the deformation the non-Abelian string is no longer BPS and we show that the fermionic superorientational zero modes are all lifted. This leaves us with the pure bosonic CP(N-1) model on the string world sheet in the limit of N=1 QCD. We also discuss what happens to confined monopoles at large $μ$.

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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