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arXiv 1802.04285hep-th
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三维$\mathcal{N}=4$ $USp(2N)$ SQCD理论的红外不动点

The Infrared Fixed Points of 3d $\mathcal{N}=4$ $USp(2N)$ SQCD Theories

Benjamin Assel, Stefano Cremonesi

摘要:

我们用$N_f$基本超多重态导出了三维$\mathcal{N}=4$ $USp(2N)$ SQCD理论库仑分支的代数描述,并从模空间的局部几何确定了它们在任意真空中的低能物理,确定了在奇点和可能的额外自由扇区处产生的相互作用SCFT.具有最大模空间的SCFT出现在库仑分支上最奇异的轨迹处。对于$N_f>2N$(好理论),它如预期的那样位于圆锥簇的原点。对于$N_f =2N$,我们发现两个独立的最奇异的点,从这两个同构的分量的希格斯分支的紫外线理论的发源地。位于这两个真空中任何一个的SCFT都只有奇维库仑分支生成器,它们在偶然的$SU(2)$全局对称性下发生变换。我们提供了一个直接的推导,他们的模空间的真空,并提出了一个拉格朗日镜像理论,这些不动点。对于$2 \le N_f < 2N$,最奇异的轨迹有一个或两个扩展组件,对于$N_f$奇数或偶数,低能理论涉及上述类型之一的相互作用SCFT,加上自由扭曲超多重态。对于$N_f=0,1$,库仑分支是平滑的。我们完成了我们的分析,通过研究低能量理论在对称真空的理论与$N < N_f \le 2N$,它表现出当地的赛伯格对偶。

英文摘要:

We derive the algebraic description of the Coulomb branch of 3d $\mathcal{N}=4$ $USp(2N)$ SQCD theories with $N_f$ fundamental hypermultiplets and determine their low energy physics in any vacuum from the local geometry of the moduli space, identifying the interacting SCFTs which arise at singularities and possible extra free sectors. The SCFT with the largest moduli space arises at the most singular locus on the Coulomb branch. For $N_f>2N$ (good theories) it sits at the origin of the conical variety as expected. For $N_f =2N$ we find two separate most singular points, from which the two isomorphic components of the Higgs branch of the UV theory emanate. The SCFTs sitting at any of these two vacua have only odd dimensional Coulomb branch generators, which transform under an accidental $SU(2)$ global symmetry. We provide a direct derivation of their moduli spaces of vacua, and propose a Lagrangian mirror theory for these fixed points. For $2 \le N_f < 2N$ the most singular locus has one or two extended components, for $N_f$ odd or even, and the low energy theory involves an interacting SCFT of one of the above types, plus free twisted hypermultiplets. For $N_f=0,1$ the Coulomb branch is smooth. We complete our analysis by studying the low energy theory at the symmetric vacuum of theories with $N < N_f \le 2N$, which exhibits a local Seiberg-like duality.

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