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arXiv 1303.3540hep-th
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N=8超重力中E_{7(7)}形变的障碍

Obstruction to E_{7(7)} Deformation in N=8 Supergravity

Murat Gunaydin, Renata Kallosh

摘要:

候选的反项在四维中打破了N=8超引力中Noether-Gaillard-Zumino E_{7(7)}的守恒。Bossard和Nicolai提出了一个方案,以洛伦兹协变的方式变形涉及向量场的子扇区,以恢复对偶性。他们认为,这种变形必然存在着一种延伸,可以延伸到保持超对称性的完整理论。我们证明了不可能像以前提出的那样,在保持广义协方差和N=8超对称性的同时,通过变形最大超引力来恢复E_{7(7)}对偶性。N=8的超引力变形需要更高的自旋和多个引力子,这对这一提议构成了具体的障碍。

英文摘要:

Candidate counterterms break Noether-Gaillard-Zumino E_{7(7)} current conservation in N=8 supergravity in four dimensions. Bossard and Nicolai proposed a scheme for deforming the subsector involving vector fields in a Lorentz covariant manner, so as to restore duality. They argued that there must exist an extension of this deformation to the full theory that preserves supersymmetry. We show that it is not possible to deform the maximal supergravity to restore E_{7(7)} duality, while maintaining both general covariance and N=8 supersymmetry, as was proposed. Deformation of N=8 supergravity requires higher spins and multiple gravitons, which presents a concrete obstacle to this proposal.

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