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

Abstract

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.

37 pages, 1 figure, some typos fixed

References in corpus (6)

• Notes on the K3 Surface and the Mathieu group M_24
• Note on Twisted Elliptic Genus of K3 Surface
• Product Representation of Dyon Partition Function in CHL Models
• How Do Black Holes Predict the Sign of the Fourier Coefficients of Siegel Modular Forms?
• Topological Amplitudes in Heterotic Strings with Wilson Lines
• $\mathcal{N}=2$ heterotic string compactifications on orbifolds of $K3\times T^2$

Cited by in corpus (1)

• State counting on fibered CY-3 folds and the non-Abelian Weak Gravity Conjecture