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arXiv 1707.07214hep-th
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完全相交Calabi-Yau流形上的异质瞬子超势

Heterotic Instanton Superpotentials from Complete Intersection Calabi-Yau Manifolds

Evgeny Buchbinder, Andre Lukas, Burt Ovrut, Fabian Ruehle

摘要:

我们研究了出现在非微扰的超势条件下产生的杂种优势理论中的世界片瞬子的Pfavians。比斯利和威滕的一个结果表明,这些瞬子贡献在给定的卡-丘流形的同调类内的曲线之间抵消,卡-丘流形可以被描述为射影或环面周围空间中的超曲面或完全相交。我们提供了一个处方,确定所有的$\mathbb{P}^1$曲线在一定的同源类的完全相交的卡-丘流形的产品的射影空间(CICY)和交叉检查我们的结果进行比较,属零Gromov-Witten不变量。然后,我们使用这种结构来研究这些流形上的瞬子超势及其子。我们确定了一个非复曲面商的一个非有利的CICY与一个单一的属零曲线在一定的同源类,所以取消à la比斯利-威滕是不可能的。在另一个例子中,我们研究了一个有利的CICY的非复曲面商,并检查超势仍然消失。从这个例子和相关的例子,我们推测,Beasley-Witten取消结果可以扩展到复曲面和非复曲面的CICY的双折射,但可以避免,如果CICY是不利的。

英文摘要:

We study Pfaffians that appear in non-perturbative superpotential terms arising from worldsheet instantons in heterotic theories. A result by Beasley and Witten shows that these instanton contributions cancel among curves within a given homology class for Calabi-Yau manifolds that can be described as hypersurfaces or complete intersections in projective or toric ambient spaces. We provide a prescription that identifies all $\mathbb{P}^1$ curves in certain homology classes of complete intersection Calabi-Yau manifolds in products of projective spaces (CICYs) and cross-check our results by a comparison with the genus zero Gromov-Witten invariants. We then use this construction to study instanton superpotentials on those manifolds and their quotients. We identify a non-toric quotient of a non-favorable CICY with a single genus zero curve in a certain homology class, so that a cancellation à la Beasley-Witten is not possible. In another example, we study a non-toric quotient of a favorable CICY and check that the superpotential still vanishes. From this and related examples, we conjecture that the Beasley-Witten cancellation result can be extended to toric and non-toric quotients of CICYs, but can be avoided if the CICY is non-favorable.

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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