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arXiv 0905.1752astro-ph.COhep-th
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快速滚动暴胀的宇宙学约束

Cosmological Constraints on Rapid Roll Inflation

Takeshi Kobayashi, Shinji Mukohyama, Brian A. Powell

摘要:

我们得到宇宙学约束模型的通货膨胀表现出快速滚动解决方案。快速滚动吸引子存在于具有大质量项的势中,因此对于弦论中的暴胀模型的建立是有意义的。我们约束了快速滚动暴胀产生的功率谱的一般假设,在小场限制下,该假设可以与具有可变质量项和非最小引力耦合的树级混合势$ξRϕ^2$相关联。我们考虑通过调制再加热和/或曲率机制在这些模型中的暴胀子波动所产生的观测上不可接受的主要光谱的地方产生的扰动。高阶$k$之间的层次结构的缺乏-功率谱的依赖性的结果在模型中具有潜在的大的运行,使我们能够使用CMB和LSS数据对这样的模型施加严格的约束。特别地,我们发现$n_s <1$和$|α| < 0.01$。最后,我们得出了一个具体的实现快速滚动膨胀内翘曲喉膜膨胀,这是在良好的协议与目前的数据。

英文摘要:

We obtain cosmological constraints on models of inflation which exhibit rapid roll solutions. Rapid roll attractors exist for potentials with large mass terms and are thus of interest for inflationary model building within string theory. We constrain a general ansatz for the power spectrum arising from rapid roll inflation that, in the small field limit, can be associated with tree level hybrid potentials with variable mass terms and nonminimal gravitational coupling $ξRϕ^2$. We consider perturbations generated through modulated reheating and/or curvaton mechanisms in place of the observationally unacceptable primary spectra generated by inflaton fluctuations in these models. The lack of a hierarchy amongst higher-order $k$-dependencies of the power spectrum results in models with potentially large runnings, allowing us to impose tight constraints on such models using CMB and LSS data. In particular, we find $n_s <1$ and $|α| < 0.01$. We conclude with a concrete realization of rapid roll inflation within warped throat brane inflation that is in good agreement with current data.

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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