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题名: Lyth bound revisited
作者: Huang, QG
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 91, 期号:12, 页码:123532
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.91.123532
通讯作者: Huang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: Imposing that the excursion distance of the inflaton in field space during inflation be less than the Planck scale, we derive an upper bound on the tensor-to-scalar ratio at the cosmic microwave background scales, i.e., r(*),(max), in the general canonical single-field slow-roll inflation model, in particular, the model with non-negligible running of the spectral index alpha(s) and/or the running of running beta(s). We find that r(*),(max) similar or equal to 7 x 10(-4) for n(s) = 0.9645 without running and running of running, and r(*),(max) is significantly relaxed to the order of O(10(-2) similar to 10(-1)) in the inflation model with alpha(s) and/or beta(s) similar to + O(10(-2)) which are marginally preferred by the Planck 2015 data.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: INFLATIONARY UNIVERSE ;  FLATNESS ;  SPECTRUM ;  HORIZON
收录类别: SCI
项目资助者: Chinese Academy of Science ;  NSFC [11322545, 11335012]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20955
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Recommended Citation:
Huang, QG. Lyth bound revisited[J]. PHYSICAL REVIEW D,2015,91(12):123532.
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