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arXiv 1502.07746hep-thastro-ph.COhep-ph
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宇宙学模与后暴胀宇宙:一个批判性的评论

Cosmological Moduli and the Post-Inflationary Universe: A Critical Review

Gordon Kane, Kuver Sinha, Scott Watson

摘要:

我们批判性地回顾宇宙学模量在确定宇宙的后暴胀历史中的作用。模在超越标准模型物理学的弦和M理论结构中无处不在,它们参数化了紧致流形的几何。对于那些由超对称破缺决定质量的物质,这导致它们最终在大爆炸核合成之前不久衰变(而不破坏其预测)。这将导致在暴胀结束后不久出现一个物质主导的阶段,这可能会影响重子和暗物质的起源,以及宇宙微波背景的观测和大尺度结构的生长。鉴于基础理论的进展,以及暗物质和对撞机实验的指导,非热历史已经成为严格热历史的一个强大的和理论上有充分动机的替代方案。我们回顾这种方法的早期宇宙和讨论的理论挑战和观测的影响。

英文摘要:

We critically review the role of cosmological moduli in determining the post-inflationary history of the universe. Moduli are ubiquitous in string and M-theory constructions of beyond the Standard Model physics, where they parametrize the geometry of the compactification manifold. For those with masses determined by supersymmetry breaking this leads to their eventual decay slightly before Big Bang Nucleosynthesis (without spoiling its predictions). This results in a matter dominated phase shortly after inflation ends, which can influence baryon and dark matter genesis, as well as observations of the Cosmic Microwave Background and the growth of large-scale structure. Given progress within fundamental theory, and guidance from dark matter and collider experiments, non-thermal histories have emerged as a robust and theoretically well-motivated alternative to a strictly thermal one. We review this approach to the early universe and discuss both the theoretical challenges and the observational implications.

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