期刊
PHYSICAL REVIEW D
卷 88, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.103506
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资金
- Perimeter Institute for Theoretical Physics
- Government of Canada through Industry Canada
- Province of Ontario through Ministry of Research and Innovation
- Eberly Research Funds of The Pennsylvania State University
- Eberly College of Science
- Office of the Senior Vice President for Research at the Pennsylvania State University
- Canadian Institute for Advanced Research
- Banting program
- Perimeter Institute for Theoretical Physics
- Government of Canada through Industry Canada
- Province of Ontario through Ministry of Research and Innovation
- Eberly Research Funds of The Pennsylvania State University
- Eberly College of Science
- Office of the Senior Vice President for Research at the Pennsylvania State University
- Canadian Institute for Advanced Research
- Banting program
We describe a general procedure for using number counts of any object to constrain the probability distribution of the primordial fluctuations, allowing for generic weak non-Gaussianity. We apply this procedure to use limits on the abundance of primordial black holes and dark matter ultracompact minihalos to characterize the allowed statistics of primordial fluctuations on very small scales. We present constraints on the power spectrum and the amplitude of the skewness for two different families of non-Gaussian distributions, distinguished by the relative importance of higher moments. Although primordial black holes probe the smallest scales, ultracompact minihalos provide significantly stronger constraints on the power spectrum and so are more likely to eventually provide small-scale constraints on non-Gaussianity.
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