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arXiv 0810.0524hep-th
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由简并粒子激发的SUGRA模型中的宇宙学常数

Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua

C. D. Froggatt, R. Nevzorov, H. B. Nielsen

摘要:

众所周知,在无标度超引力中,整体对称性保护了局部超对称性和宇宙学常数的零值。这些对称性的一个特殊的破坏,确保真空能量密度的消失,导致自然实现的多点原理(MPP)。在受MPP启发的SUGRA模型中,宇宙学常数自然很小。

英文摘要:

It is well known that global symmetries protect local supersymmetry and a zero value for the cosmological constant in no--scale supergravity. A particular breakdown of these symmetries, which ensures the vanishing of the vacuum energy density, leads to the natural realisation of the multiple point principle (MPP). In the MPP inspired SUGRA models the cosmological constant is naturally tiny.

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