Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era - INSPIRE

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Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era

Bernard Carr
(
- Queen Mary, U. of London
)
,
Tommi Tenkanen
(
- Queen Mary, U. of London
)
,
Ville Vaskonen
(
- NICPB, Tallinn
)

Jun 12, 2017

10 pages

Published in:

Phys.Rev.D 96 (2017) 6, 063507

Published: Sep 12, 2017

e-Print:

1706.03746 [astro-ph.CO]

DOI:

10.1103/PhysRevD.96.063507

View in:

ADS Abstract Service

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Abstract: (APS)

We study production of primordial black holes (PBHs) during an early matter-dominated phase. As a source of perturbations, we consider either an inflaton field with a running spectral index or a spectator field that has a blue spectrum and thus provides a significant contribution to PBH production at small scales. First, we identify the region of the parameter space where a significant fraction of the observed dark matter can be produced, taking into account all current PBH constraints. Then, we present constraints on the amplitude and spectral index of the spectator field as a function of the reheating temperature. We also derive constraints on the running of the inflaton spectral index, dn/dlnk≲0.001, which are comparable to those from the Planck satellite for a scenario where the spectator field is absent.

Note:

10 pages, 7 figures. v2: Minor changes to v1, accepted for publication in Phys. Rev. D

black hole: primordial
black hole: formation
temperature: reheating
satellite: Planck
spectator
cosmic background radiation: power spectrum
inflaton: Higgs particle
perturbation
dark matter: parametrization

References(82)

Figures(9)

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