Rare decay modes of quarter BPS dyons
Rare decay modes of quarter BPS dyons
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四分之一 BPS dyon 的罕见衰变模式
DOI：
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发表时间：
2007
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通讯作者：
A. Sen
中科院分区：
文献类型：
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作者：
A. Sen
在= 4超对称弦理论中，四分之一BPS dyons的简并性可以跨越边缘稳定壁，在此壁上，一个四分之一BPS dyons可以衰变成一对半BPS dyons。我们证明了只要原始dyon的电荷和磁荷是电荷晶格的基本元素，那么在模空间的子空间中，当一个四分之一BPS dyon衰变为一对四分之一BPS dyon或一个半BPS dyon和一个四分之一BPS dyon时，其子空间的余维为2或更多。结果表明，模空间中的任意对一般点都可以通过避开这些子空间的路径连接起来，并且与这些子空间相关联的频谱不存在跳变。
The degeneracy of quarter BPS dyons in = 4 supersymmetric string theories is known to jump across walls of marginal stability on which a quarter BPS dyon can decay into a pair of half BPS dyons. We show that as long as the electric and magnetic charges of the original dyon are primitive elements of the charge lattice, the subspaces of the moduli space on which a quarter BPS dyon becomes marginally unstable against decay into a pair of quarter BPS dyons or a half BPS dyon and a quarter BPS dyon are of codimension two or more. As a result any pair of generic points in the moduli space can be connected by a path avoiding these subspaces and there is no jump in the spectrum associated with these subspaces.