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arXiv 0910.3674hep-th
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微扰和非微扰N =8超引力

Perturbative and Non-perturbative N =8 Supergravity

Massimo Bianchi, Sergio Ferrara, Renata Kallosh

摘要:

研究了N = 8超引力中的极值黑洞及其ADM质量和视界面积。与从N = 2,4理论得到的直觉相反,在N = 8的超引力中,BPS态可能仅在模空间的边界处变得无质量。我们证明了在[1]中描述的弦态,除了微扰N = 8超引力的无质量态外,没有质量隙并在环形紧化中存活,当被视为N = 8爱因斯坦方程的解时,在四维时空中显示零奇点。我们分析了解决这种奇异性的已知方法,并解释了为什么它们在D=4,N = 8的超引力中不起作用。我们讨论了四维N = 8微扰理论的UV有限性问题的可能影响。

英文摘要:

We study extremal black holes, their ADM mass and area of the horizon in N = 8 supergravity. Contrary to intuition gained from N = 2, 4 theories, in N = 8 supergravity BPS states may become massless only at the boundary of moduli space. We show that stringy states described in [1], which have no mass gap and survive in the toroidal compactification in addition to massless states of perturbative N = 8 supergravity, display a null singularity in four-dimensional space-time, when viewed as solutions of N = 8 Einstein equations. We analyze known methods of resolving such singularities and explain why they do not work in D=4, N = 8 supergravity. We discuss possible implications for the issue of UV finiteness of the four-dimensional N = 8 perturbation theory.

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