期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2012/01/035
关键词
primordial black holes; inflation
资金
- Dark Universe [TR33]
- Deutsche Forschungsgemeinschaft
- Bonn-Cologne Graduate School
A broad range of single field models of inflation are analyzed in light of all relevant recent cosmological data, checking whether they can lead to the formation of long-lived Primordial Black Holes (PBHs). To that end we calculate the spectral index of the power spectrum of primordial perturbations as well as its first and second derivatives. PBH formation is possible only if the spectral index increases significantly at small scales, i.e. large wave number k. Since current data indicate that the first derivative alpha(S) of the spectral index n(S) (k(0)) is negative at the pivot scale k(0), PBH formation is only possible in the presence of a sizable and positive second derivative (running of the running) beta(S). Among the three small-field and five large-field models we analyze, only one small-field model, the running mass model, allows PBH formation, for a narrow range of parameters. We also note that none of the models we analyze can accord for a large and negative value of alpha(S), which is weakly preferred by current data.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据