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Speaker |
Kawasaki, Masahiro |
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| Talk Title |
Primordial black hole formation in inflation models and production of gravitational waves |
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Abstract |
Primordial black holes (PBHs) are one of promising candidates to explain the gravitational wave events observed by the LIGO detectors. PBHs are produced from large density perturbations generated during inflation. We show that a multi-field inflation model can produce a sufficient number of PBHs. In particular, the model predicts two peaks in PBH mass spectrum and hence can explain not only LIGO GW events but also all dark matter of the universe. Furthermore, density perturbations large enough to produce PBHs generate gravitational waves via the second-order effect. The produced gravitational waves have a broad spectrum (nHz - O(10)Hz) and can be detected in future GW detectors like SKA, LISA and DECIGO. Refs.(1) K. Inomata, M. Kawasaki, K. Mukaida and T. T. Yanagida, Phys. Rev. D97,, 043514 (2018) [arXiv:1711.06129 [astro-ph.CO]] (2) K. Inomata, M. Kawasaki, K. Mukaida, Y. Tada and T. T. Yanagida, Phys. Rev. D95, 123510 (2017) [arXiv:1611.06130 [astro-ph.CO]] (3) M. Kawasaki, A. Kusenko, Y. Tada and T. T. Yanagida, Phys. Rev. D94, 083523 (2016) [arXiv:1606.07631 [astro-ph.CO]] |
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