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arXiv 1202.5595hep-th
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关于Higgs分支根处的BPS谱

On the BPS Spectrum at the Root of the Higgs Branch

Nick Dorey, Kirill Petunin

摘要:

研究了规范群SU(n)和Higgs分支根上的$n\le N_{f}<2n$基本味的四维$\mathcal{N}=2$超对称理论的BPS谱和边缘稳定壁。该理论的强耦合谱在hep-th/9902134中被证明与二维超对称$\mathbb{CP}^{2n-N_{f}-1}$西格玛模型的强耦合谱一致。使用Kontsevich-Soibelman跨壁公式,我们从固定的强耦合谱开始,并将其外推到模空间的所有其他区域。在弱耦合区,我们的结果与hep-th/9902134的半经典分析完全一致:除了通常的双子、夸克和$W$玻色子,如果复质量服从一个特殊的不等式,得到的弱耦合谱包括一个双子和一个或多个夸克组成的束缚态塔。在$\mathbb{Z}_{n}$ -对称质量的特殊情况下,奇质量的$n$存在一个夸克的束缚态,偶质量的$n$不存在束缚态.

英文摘要:

We study the BPS spectrum and walls of marginal stability of the $\mathcal{N}=2$ supersymmetric theory in four dimensions with gauge group SU(n) and $n\le N_{f}<2n$ fundamental flavours at the root of the Higgs branch. The strong-coupling spectrum of this theory was conjectured in hep-th/9902134 to coincide with that of the two-dimensional supersymmetric $\mathbb{CP}^{2n-N_{f}-1}$ sigma model. Using the Kontsevich--Soibelman wall-crossing formula, we start with the conjectured strong-coupling spectrum and extrapolate it to all other regions of the moduli space. In the weak-coupling regime, our results precisely agree with the semiclassical analysis of hep-th/9902134: in addition to the usual dyons, quarks, and $W$ bosons, if the complex masses obey a particular inequality, the resulting weak-coupling spectrum includes a tower of bound states consisting of a dyon and one or more quarks. In the special case of $\mathbb{Z}_{n}$-symmetric masses, there are bound states with one quark for odd $n$ and no bound states for even $n$.

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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