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arXiv 2004.12135hep-th
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具有Wilson系的${\cal N}=2$杂种优势紧致化中的引力耦合

Gravitational couplings in ${\cal N}=2$ heterotic compactifications with Wilson lines

Aradhita Chattopadhyaya

备注：
37 pages, 1 figure, some typos fixed
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摘要：

本文计算了在$(K3\times T^2)/\mathbb{Z}_N$和$E_8\times E_8$上紧化的杂化弦的引力耦合，并在Wilson线存在的情况下预言了对偶Calabi-Yau流形的Gopakumar-Vafa不变量.这里，$\mathbb{Z}_N$充当与$M_{23}$的共轭类相关联的$K3$上的自同构以及$T^2$的其中一个$S^1$上的$1/N$的移位。我们详细研究的情况下$N=2,3$标准和几个非标准的嵌入$K3$实现为环形orbifolds $T^4/\mathbb{Z}_4$和$T^4/\mathbb{Z}_3$。从这些计算中，我们提取的多项式项的微扰前潜在的这些orbifold模型中存在的一个单一的威尔逊线。我们还表明，标准嵌入的Gopakumar Vafa不变量的完整性依赖于傅立叶变换的扭曲椭圆属的$K3$在$n<8$威尔逊线的傅立叶系数的完整性。

英文摘要：

In this paper we compute the gravitational couplings of the heterotic string compactified on $(K3\times T^2)/\mathbb{Z}_N$ and $E_8\times E_8$ and predict the Gopakumar Vafa invariants of the dual Calabi Yau manifold in presence of Wilson lines. Here $\mathbb{Z}_N$ acts as an automorphism on $K3$ associated with the conjugacy classes of $M_{23}$ and a shift of $1/N$ on one of the $S^1$ of $T^2$. We study in detail the cases $N=2,3$ for standard and several non-standard embeddings where $K3$ is realized as toroidal orbifolds $T^4/\mathbb{Z}_4$ and $T^4/\mathbb{Z}_3$. From these computations we extract the polynomial term in perturbative pre-potential for these orbifold models in presence of a single Wilson line. We also show for standard embeddings the integrality of the Gopakumar Vafa invariants depend on the integrality of Fourier coefficients of Fourier transform of the twisted elliptic genus of $K3$ in presence of $n<8$ Wilson lines.

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