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arXiv 1606.08982hep-thmath.AGmath.NT
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带挠和一般丛的杂优紧化的Dressed椭圆亏格

Dressed elliptic genus of heterotic compactifications with torsion and general bundles

Dan Israel, Matthieu Sarkis

摘要:

本文定义并计算了K3曲面上N = 2的带挠的杂优紧化的dressed椭圆亏格。我们考虑最一般的规范丛兼容超对称,一个稳定的全纯向量丛的基础上的阿贝尔丛在整个空间,推广的计算以前所做的作者在没有后者。从一个有挠的(0,2)规范线性σ模型出发,我们利用超对称局部化方法得到了这个结果。我们还提供了一个数学定义的修饰椭圆亏格作为修改后的欧拉特征,并证明了这两个表达式同意在加权射影空间的超曲面。最后,我们表明,它承认一个自然的分解N = 4超共形字符,这可能是有用的调查月光现象,这类广泛的N = 2真空,其中包括K3*T2紧化作为特殊情况。

英文摘要:

We define and compute the dressed elliptic genus of N = 2 heterotic compactifications with torsion that are principal two-torus bundles over a K3 surface. We consider the most general gauge bundle compatible with supersymmetry, a stable holomorphic vector bundle over the base together with an Abelian bundle over the total space, generalizing the computation previously done by the authors in the absence of the latter. Starting from a (0,2) gauged linear sigma-model with torsion we use supersymmetric localization to obtain the result. We provide also a mathematical definition of the dressed elliptic genus as a modified Euler characteristic and prove that both expressions agree for hypersurfaces in weighted projective spaces. Finally we show that it admits a natural decomposition in terms of N = 4 superconformal characters, that may be useful to investigate moonshine phenomena for this wide class of N = 2 vacua, that includes K3*T2 compactifications as special cases.

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