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arXiv 0901.4962hep-thhep-ph
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余维2膜膨胀

Codimension-2 brane inflation

Hyun Min Lee, Antonios Papazoglou

摘要:

我们考虑一个探测余维-2膜膨胀方案在一个弯曲的六维通量紧化。我们的背景模型是Salam-Sezgin规范超引力与余维2膜源,保持N=1超对称。该模型有一个模量,这是稳定的帽正规化的余维-2奇点的装置,与适当的电子自旋势的环界面上的帽子与散装。本文讨论了余维为2的探测膜沿内部空间径向运动时世界体积的宇宙学演化。为了实现慢卷暴胀,我们需要内部空间的翘曲很弱,这与最近的弦暴胀构造具有很强的翘曲相反。我们讨论了暴胀与观测推断的参数相一致的参数范围,并进一步讨论了暴胀与探测膜近似相一致的参数范围。我们提供的参数指出,探针膜近似是一个很好的假设,如果探针膜不完全是圆锥形的,并显示与多膜的解决方案,需要一个缓慢的滚动膨胀的温和翘曲不破坏的探针膜。

英文摘要:

We consider a probe codimension-2 brane inflation scenario in a warped six-dimensional flux compactification. Our background model is Salam-Sezgin gauged supergravity with codimension-2 brane sources, which preserve N=1 supersymmetry. The model has a modulus, which is stabilised by means of a cap regularisation of the codimension-2 singularities, with appropriate dilaton potentials on the ring interface of the caps with the bulk. We discuss the cosmological evolution of the world-volume of a probe codimension-2 brane when it moves along the radial direction of the internal space. In order to have slow-roll inflation, one needs the warping of the internal space to be weak, in contrast to the recent string inflation constructions with strong warping. We discuss the parameter range that the inflation is in agreement with the observationally inferred parameters and which furthermore is consistent with the probe brane approximation. We provide arguments pointing that the probe brane approximation is a good assumption if the probe brane is not exactly conical and show with a multibrane solution that the mild warping needed for a slow-roll inflation is not spoiled by the probe brane.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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