Evidence for inflation in an axion landscape
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DOI: 10.1007/jhep03(2018)121
Abstract: A bstractWe discuss inflation models within supersymmetry and supergravity frameworks with a landscape of chiral superfields and one U(1) shift symmetry which is broken by non-perturbative symmetry breaking terms in the superpotential. We label the… read more here.
Keywords: curvature perturbations; axion; axion landscape; parameter space ... See more keywords
Constraints on primordial curvature perturbations from primordial black hole dark matter and secondary gravitational waves
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/12/031
Abstract: Primordial black holes and secondary gravitational waves can be used to probe the small scale physics at very early time. For secondary gravitational waves produced after the horizon reentry, we derive an analytical formula for… read more here.
Keywords: gravitational waves; primordial black; primordial curvature; constraints primordial ... See more keywords
Nonlinear statistics of primordial black holes from Gaussian curvature perturbations
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DOI: 10.1103/physrevd.101.063520
Abstract: We develop the non-linear statistics of primordial black holes generated by a gaussian spectrum of primordial curvature perturbations. This is done by employing the compaction function as the main statistical variable under the constraints that:… read more here.
Keywords: statistics primordial; black holes; density; curvature perturbations ... See more keywords
Effect of nonlinearity between density and curvature perturbations on the primordial black hole formation
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DOI: 10.1103/physrevd.99.123501
Abstract: We study the effect of the nonlinear relation between density and curvature perturbations on the formation of PBHs. By calculating the variance and skewness of the density perturbation we derive the non-Gaussian property. As a… read more here.
Keywords: density curvature; formation; density; curvature perturbations ... See more keywords