Primordial black holes as a tool for constraining non-Gaussianity

Byrnes, Christian T.; Copeland, Edmund J.; Green, Anne M.

doi:10.1103/physrevd.86.043512

Cited by 173 publications

(197 citation statements)

References 67 publications

(80 reference statements)

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“…The PBH formation in the case of this distribution has been studied in Ref. [94], and then also in [26,95]. In this case, the expression (A.6) gives (see for example Section IV of Ref.…”

Section: A2 P ζ − β Relationmentioning

confidence: 99%

Gravitational waves at interferometer scales and primordial black holes in axion inflation

García-Bellido

Peloso

Ünal

2016

J. Cosmol. Astropart. Phys.

227

287

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Abstract. We study the prospects of detection at terrestrial and space interferometers, as well as at pulsar timing array experiments, of a stochastic gravitational wave background which can be produced in models of axion inflation. This potential signal, and the development of these experiments, open a new window on inflation on scales much smaller than those currently probed with Cosmic Microwave Background and Large Scale Structure measurements. The sourced signal generated in axion inflation is an ideal candidate for such searches, since it naturally grows at small scales, and it has specific properties (chirality and non-gaussianity) that can distinguish it from an astrophysical background. We study under which conditions such a signal can be produced at an observable level, without the simultaneous overproduction of scalar perturbations in excess of what is allowed by the primordial black hole limits. We also explore the possibility that scalar perturbations generated in a modified version of this model may provide a distribution of primordial black holes compatible with the current bounds, that can act as a seeds of the present black holes in the universe.

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“…The PBH formation in the case of this distribution has been studied in Ref. [94], and then also in [26,95]. In this case, the expression (A.6) gives (see for example Section IV of Ref.…”

Section: A2 P ζ − β Relationmentioning

confidence: 99%

Gravitational waves at interferometer scales and primordial black holes in axion inflation

García-Bellido

Peloso

Ünal

2016

J. Cosmol. Astropart. Phys.

227

287

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“…For such a positive χ-squared form of non-Gaussianities, the probability distribution is given by (see e.g. [88][89][90]): …”

Section: A Quick Review Of Pbh Formationmentioning

confidence: 99%

PBH dark matter from axion inflation

Domcke

Muia

Pieroni

et al. 2017

J. Cosmol. Astropart. Phys.

109

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Protected by an approximate shift symmetry, axions are well motivated candidates for driving cosmic inflation. Their generic coupling to the Chern-Simons term of any gauge theory gives rise to a wide range of potentially observable signatures, including equilateral non-Gaussianites in the CMB, chiral gravitational waves in the range of direct gravitational wave detectors and primordial black holes (PBHs). In this paper we revisit these predictions for axion inflation models non-minimally coupled to gravity.Contrary to the case of minimally coupled models which typically predict scale-invariant mass distributions for the generated PBHs at small scales, we demonstrate how broadly peaked PBH spectra naturally arises in this setup. For specific parameter values, all of dark matter can be accounted for by PBHs.Dedicated to the memory of Pierre Binétruy

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“…Indeed we have briefly checked that the local non-linearity parameter f NL is as small as ∼ 0.1 and for such a small NG it is known that the predicted PBH abundance is hardly affected [43][44][45]. However the second peak on ∼ 30M which we will show later might be modified by NG effects since it corresponds with the phase of the beginning of the new inflation.…”

Section: Formation Of Primordial Black Holesmentioning

confidence: 99%

Primordial black holes as dark matter in supergravity inflation models

et al. 2016

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We propose a novel scenario to produce abundant primordial black holes (PBHs) in new inflation which is a second phase of a double inflation in the supergravity frame work. In our model, some preinflation phase before the new inflation is assumed and it would be responsible for the primordial curvature perturbations on the cosmic microwave background scale, while the new inflation produces only the small scale perturbations. Our new inflation model has linear, quadratic, and cubic terms in its potential and PBH production corresponds with its flat inflection point. The linear term can be interpreted to come from a supersymmetry-breaking sector, and with this assumption, the vanishing cosmological constant condition after inflation and the flatness condition for the inflection point can be consistently satisfied.

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Primordial black holes as a tool for constraining non-Gaussianity

Cited by 173 publications

References 67 publications

Gravitational waves at interferometer scales and primordial black holes in axion inflation

Gravitational waves at interferometer scales and primordial black holes in axion inflation

PBH dark matter from axion inflation

Primordial black holes as dark matter in supergravity inflation models

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