Exotic branes and non-perturbative seven branes
Exotic branes and non-perturbative seven branes
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DOI：
10.1016/s0550-3213(99)00792-0
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发表时间：
1999-08
期刊：
影响因子：
--
通讯作者：
E. Eyras;Y. Lozano
中科院分区：
文献类型：
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作者：
E. Eyras;Y. Lozano
我们构造了第二类理论中某些奇异膜的有效作用，这些作用不是由它们的时空超对称代数所预测的。我们详细地分析了NS-7B膜的情况，S对偶到D7膜，并通过T对偶连接到IIA型中的其他外来膜：KK-6A膜和KK-8A膜(分别由M理论Kaluza-Klein单极子和M9膜约简得到)。NS-7B膜携带的电荷相对于RR8型的S对，我们认为它是轴子和膨胀子的电磁对的非局域组合。对其有效作用的研究与文献中的结果一致，表明它与D7-膜一起转变为SL(2，Z)三重态。我们讨论了为什么IIB型时空超对称代数不能预测这种膜。特别地，我们证明了与D7和NS-7B膜溶液相关的模变换可以通过二维横向空间中的简单坐标变换来取消，相当于选择不同的区域来参数化SL(2，Z)模空间。我们讨论了D6和KK-6A膜与D8和KK-8A膜之间的相似关系。
We construct the effective action of certain exotic branes in the Type II theories which are not predicted by their space-time supersymmetry algebras. We analyze in detail the case of the NS-7B brane, S-dual to the D7-brane, and connected by T-duality to other exotic branes in Type IIA: the KK-6A brane and the KK-8A brane (obtained by reduction of the M-theory Kaluza–Klein monopole and M9-brane, respectively). The NS-7B brane carries charge with respect to the S-dual of the RR 8-form, which we identify as a non-local combination of the electric–magnetic duals of the axion and the dilaton. The study of its effective action agrees with previous results in the literature showing that it transforms as an SL(2, Z ) triplet together with the D7-brane. We discuss why this brane is not predicted by the Type IIB space-time supersymmetry algebra. In particular we show that the modular transformation relating the D7 and NS-7B brane solutions can be undone by a simple coordinate transformation in the two-dimensional transverse space, equivalent to choosing a different region to parametrize the SL(2, Z ) moduli space. We discuss a similar relation between the D6 and KK-6A branes and the D8 and KK-8A branes.