期刊
PHYSICAL REVIEW D
卷 99, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.056007
关键词
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资金
- Recruitment Program for Young Professionals of the 1000 Talented Plan
- Tsinghua University Initiative Scientific Research Program
- DOE [DE-SC0011632]
- Walter Burke Institute for Theoretical Physics
It was recently pointed out that in some inflationary models quantum loops containing a scalar of mass m that couples to the inflaton can be the dominant source of primordial non-Gaussianities. We explore this phenomenon in the simplest such model focusing on the behavior of the primordial curvature fluctuations for small m/H. Explicit calculations are done for the three- and four-point curvature fluctuation correlations. Constraints on the parameters of the model from the cosmic microwave background limits on primordial non-Gaussianity are discussed. The bispectrum in the squeezed limit and the trispectrum in the compressed limit are examined. The form of the n-point correlations as any partial sum of wave vectors gets small is determined.
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