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arXiv 0802.0544hep-th
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四分之一BPS双子配分函数和挠率2的双子的一般性质

Generalities of Quarter BPS Dyon Partition Function and Dyons of Torsion Two

Shamik Banerjee, Ashoke Sen, Yogesh K. Srivastava

摘要:

我们提出了一个一般性的一套限制的配分函数的四分之一BPS双子在任何N=4超对称弦论的洞察力,从已知的例子,并研究这一建议的后果。我们分析的主要内容是对偶对称性、过壁公式和黑洞熵。我们用我们的分析来约束两种未知情况下的双子配分函数--T^6上杂化弦论中挠率为2的双子的配分函数(即gcd(Q \wedge P)=2)和Z_2 CHL模型中带无扭曲扇形电荷的双子的配分函数.在这些约束的帮助下,我们提出了T^6上杂化弦论中挠率为2的双子的配分函数的候选者。这导致了一个新的跨壁公式的四分之一BPS的双子衰变为半BPS的非原始电荷矢量的双子。在适当的极限下,所提出的公式再现了规范理论中已知的挠二双子谱的结果。

英文摘要:

We propose a general set of constraints on the partition function of quarter BPS dyons in any N=4 supersymmetric string theory by drawing insight from known examples, and study the consequences of this proposal. The main ingredients of our analysis are duality symmetries, wall crossing formula and black hole entropy. We use our analysis to constrain the dyon partition function for two hitherto unknown cases -- the partition function of dyons of torsion two (i.e. gcd(Q\wedge P)=2) in heterotic string theory on T^6 and the partition function of dyons carrying untwisted sector electric charge in Z_2 CHL model. With the help of these constraints we propose a candidate for the partition function of dyons of torsion two in heterotic string theory on T^6. This leads to a novel wall crossing formula for decay of quarter BPS dyons into half BPS dyons with non-primitive charge vectors. In an appropriate limit the proposed formula reproduces the known result for the spectrum of torsion two dyons in gauge theory.

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