arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.01192astro-ph.COhep-phhep-th
收藏

暴胀观测的期望:简单还是自然?

Expectations for Inflationary Observables: Simple or Natural?

Nathan Musoke, Richard Easther

摘要:

我们描述了一般的暴胀动力学,可以出现一个单一的,正则耦合场的暴胀势是一个4阶多项式。这种情况下产生的经验光谱观测值,$n_s$,$r$和$α_s$的组合范围很广。然而,并不是所有的组合都是可能的,下一代宇宙学实验有能力排除基于这种可能性的所有暴胀情景。此外,我们构造的基础上物理动机的选择,其自由参数的潜在的通货膨胀的先验。这些可用于确定与$n_s$、$r$和$α_s$的不同组合相关联的调谐程度,并且将促进暴胀模型选择问题的处理。最后,我们评论的影响,这些结果的自然性的整体通货膨胀的范式。我们认为,排除所有简单的潜力并不一定意味着通货膨胀的范式本身是不自然的,但这种可能性将增加建设的重要性,在更广泛的超高能物理学范式的背景下,通货膨胀的情况。

英文摘要:

We describe the general inflationary dynamics that can arise with a single, canonically coupled field where the inflaton potential is a 4-th order polynomial. This scenario yields a wide range of combinations of the empirical spectral observables, $n_s$, $r$ and $α_s$. However, not all combinations are possible and next-generation cosmological experiments have the ability to rule out all inflationary scenarios based on this potential. Further, we construct inflationary priors for this potential based on physically motivated choices for its free parameters. These can be used to determine the degree of tuning associated with different combinations of $n_s$, $r$ and $α_s$ and will facilitate treatments of the inflationary model selection problem. Finally, we comment on the implications of these results for the naturalness of the overall inflationary paradigm. We argue that ruling out all simple potentials would not necessarily imply that the inflationary paradigm itself was unnatural, but that this eventuality would increase the importance of building inflationary scenarios in the context of broader paradigms of ultra-high energy physics.

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。

↑