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arXiv 0811.2176astro-phhep-ph
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后暴胀早期宇宙的非高斯特征

Non-Gaussian Signatures from the Postinflationary Early Universe

Alessandra Silvestri, Mark Trodden

摘要:

我们考虑的贡献,非高斯的宇宙微波背景(CMB)的残留物后暴胀相变在非常早期的宇宙。乐观地说,这些特征可以用来通过宇宙学观测发现新粒子物理学的证据。更保守地说,他们提供了一个潜在的障碍,提取信息的非高斯性质的原始密度波动从任何检测的CMB。我们证明了这一点,明确地计算从全球纹理,这可能是从广泛的粒子物理模型类产生的双谱。

英文摘要:

We consider contributions to non-Gaussianity of the Cosmic Microwave Background (CMB) from remnants of post-inflationary phase transitions in the very early universe. Such signatures can optimistically be used to discover evidence of new particle physics through cosmological observations. More conservatively they provide a potential obstacle to extracting information about the non-Gaussian nature of primordial density fluctuations from any detection in the CMB. We demonstrate this explicitly by computing the bispectrum from global textures, which may be generated from a wide class of particle physics models.

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