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arXiv 1107.3754astro-ph.COhep-ph
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瀑布跃迁、黑洞约束和非高斯性的曲率扰动谱

Curvature perturbation spectra from waterfall transition, black hole constraints and non-Gaussianity

Edgar Bugaev, Peter Klimai

摘要:

我们进行了数值计算的瀑布场的贡献的原始曲率扰动(均匀密度超曲面)$ζ$,这是在瀑布过渡的混合暴胀的情况下产生的。该计算是针对模型参数值的宽区间执行的。我们发现,有一个强烈的增长的振幅的曲率扰动谱的极限时,裸质量平方的瀑布场成为可比的平方哈勃参数。我们表明,在这个限制的原始黑洞的约束曲率扰动必须考虑在内。结果表明,在相同的极限下,曲率扰动谱的峰值远超过视界,且谱是强非高斯的。

英文摘要:

We carried out numerical calculations of a contribution of the waterfall field to the primordial curvature perturbation (on uniform density hypersurfaces) $ζ$, which is produced during waterfall transition in hybrid inflation scenario. The calculation is performed for a broad interval of values of the model parameters. We show that there is a strong growth of amplitudes of the curvature perturbation spectrum in the limit when the bare mass-squared of the waterfall field becomes comparable with the square of Hubble parameter. We show that in this limit the primordial black hole constraints on the curvature perturbations must be taken into account. It is shown that, in the same limit, peak values of the curvature perturbation spectra are far beyond horizon, and the spectra are strongly non-Gaussian.

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