Double inflation as a single origin of primordial black holes for all dark matter and LIGO observations

Inomata, Keisuke; Kawasaki, Masahiro; Mukaida, Kyohei; Yanagida, Tsutomu T.

doi:10.1103/physrevd.97.043514

Cited by 147 publications

(132 citation statements)

References 113 publications

(196 reference statements)

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“…For a robust 6 We note that in Refs. [9,17,19] the sharp peak is realized mainly by the cancellation of the Hubble-induced mass during the oscillation phase due to the kinetic coupling, while it is simply a red-tilted one due to the inflaton's mass in this paper such as Refs. [18,63,64].…”

Section: Plmentioning

confidence: 73%

“…In particular, Refs. [9,[16][17][18][19] show that sharp peaks of the curvature power spectrum can appear on the scales corresponding with the transitions between inflationary phases. From this viewpoint, each interesting mass region mentioned above may correspond with such an transition time of some multi-phase inflation.…”

Section: B Mass Spectrum Of Primordial Black Holesmentioning

confidence: 97%

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Primordial black hole tower: Dark matter, earth-mass, and LIGO black holes

2019

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We investigate a possibility of primordial black hole (PBH) formation with a hierarchical mass spectrum in multiple phases of inflation. As an example, we find that one can simultaneously realize a mass spectrum which has recently attracted a lot of attention: stellar-mass PBHs (∼ O(10)M ) as a possible source of binary black holes detected by LIGO/Virgo collaboration, asteroid-mass (∼ O(10 −12 )M ) as a main component of dark matter, and earth-mass (∼ O(10 −5 )M ) as a source of ultrashort-timescale events in Optical Gravitational Lensing Experiment microlensing data. The recent refined de Sitter swampland conjecture may support such a multi-phase inflationary scenario with hierarchical mass PBHs as a transition signal of each inflationary phase.

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Section: Plmentioning

confidence: 73%

Section: B Mass Spectrum Of Primordial Black Holesmentioning

confidence: 97%

Primordial black hole tower: Dark matter, earth-mass, and LIGO black holes

2019

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“…The mechanisms of amplifying the small-scale curvature perturbations within the infla- 1 It is worthing pointing out that the scalar induced GWs are gauge independent [26][27][28]. tionary scenario have been extensively studied in recent years [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. The most common mechanism is the single-field inflection-point inflation [38][39][40][41][42][43][44][45], which requires that the potential of the inflaton field has an approximate inflection point.…”

Section: Introductionmentioning

confidence: 99%

Scalar induced gravitational waves in inflation with gravitationally enhanced friction

2020

Phys. Rev. D

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We study the scalar induced gravitational wave (GW) background in inflation with gravitationally enhanced friction (GEF). The GEF mechanism, which is realized by assuming a nonminimal derivative coupling between the inflaton field and gravity, is used to amplify the small-scale curvature perturbations to generate a sizable amount of primordial black holes. We find that the GW energy spectra can reach the detectable scopes of the future GW projects, and the power spectrum of curvature perturbations has a power-law form in the vicinity of the peak. The scaling of the GW spectrum in the ultraviolet regions is two times that of the power spectrum slope, and has a lower bound. In the infrared regions, the slope of the GW spectrum can be described roughly by a log-dependent form. These features of the GW spectrum may be used to check the GEF mechanism if the scalar induced GWs are detected in the future.

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“…Such primordial black holes (PBHs) can account for all or part of the dark matter (DM) (e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]). PBHs can be associated with a variety of astrophysical phenomena, including the recently discovered [21][22][23] gravitational waves (e.g.…”

Section: Introductionmentioning

confidence: 99%

Analytic description of primordial black hole formation from scalar field fragmentation

Cotner

Kusenko

Sasaki

et al. 2019

J. Cosmol. Astropart. Phys.

137

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Primordial black hole (PBH) formation is a more generic phenomenon than was once thought. The dynamics of a scalar field in inflationary universe can produce PBHs under mild assumptions regarding the scalar potential. In the early universe, light scalar fields develop large expectation values during inflation and subsequently relax to the minimum of the effective potential at a later time. During the relaxation process, an initially homogeneous scalar condensate can fragment into lumps via an instability similar to the gravitational (Jeans) instability, where the scalar self-interactions, rather than gravity, play the leading role. The fragmentation of the scalar field into lumps (e.g. Q-balls or oscillons) creates matter composed of relatively few heavy "particles", whose distribution is subject to significant fluctuations unconstrained by comic microwave background (CMB) observations and unrelated to the large-scale structure. If this matter component comes to temporarily dominate the energy density before the scalar lumps decay, PBHs can be efficiently produced during the temporary matter-dominated era. We develop a general analytic framework for description of PBH formation in this class of models. We highlight the differences between the scalar fragmentation scenario and other commonly considered PBH formation models. Given the existence of the Higgs field and the preponderance of scalar fields within supersymmetric and other models of new physics, PBHs constitute an appealing and plausible candidate for dark matter.

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Double inflation as a single origin of primordial black holes for all dark matter and LIGO observations

Cited by 147 publications

References 113 publications

Primordial black hole tower: Dark matter, earth-mass, and LIGO black holes

Primordial black hole tower: Dark matter, earth-mass, and LIGO black holes

Scalar induced gravitational waves in inflation with gravitationally enhanced friction

Analytic description of primordial black hole formation from scalar field fragmentation

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