arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1008.2156hep-th
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(0,2)大象

(0,2) Elephants

Paul S. Aspinwall, Ilarion V. Melnikov, M. Ronen Plesser

摘要:

我们以三种不同的方式在Calabi-Yau三重空间上用“标准嵌入”枚举了杂种弦的(0,2)-紧化的无质量E6单态。在大半径极限的三重,这些单计数变形的卡-丘连同其切丛。在“小半径”限制下,我们应用Landau-Ginzburg方法。在轨道极限中,我们使用几何和自由场方法的组合。一般来说,这些计数是不同的。我们展示了如何识别这些阶段之间的状态,以及某些状态如何从无质量光谱中消失,因为一个变形的复杂结构或Kaehler形式远离Gepner点。在所有三张图片中探索了复杂结构的特定值的额外单态的外观,我们的结果表明,这并不依赖于Kaehler模量。

英文摘要:

We enumerate massless E6 singlets for (0,2)-compactifications of the heterotic string on a Calabi-Yau threefold with the "standard embedding" in three distinct ways. In the large radius limit of the threefold, these singlets count deformations of the Calabi-Yau together with its tangent bundle. In the "small-radius" limit we apply Landau-Ginzburg methods. In the orbifold limit we use a combination of geometry and free field methods. In general these counts differ. We show how to identify states between these phases and how certain states vanish from the massless spectrum as one deforms the complex structure or Kaehler form away from the Gepner point. The appearance of extra singlets for particular values of complex structure is explored in all three pictures, and our results suggest that this does not depend on the Kaehler moduli.

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