Primordial Black Holes as Dark Matter: New Formation Scenarios and Astrophysical Effects
Scalar field instability can lead to a short matter dominated era, during which the matter is represented by large lumps of the scalar field, whose distribution exhibits large fluctuations, leading to copious production of primordial black holes (PBH). The PBH abundance can be sufficient to explain up to 100% of dark matter without violating observational constraints. Small PBH can destabilize neutron stars and contribute to r-process nucleosynthesis.
I thank the Simons Foundation for support and hospitality of the Simons Symposium, which stimulated many new ideas, including a new project that K. Abazajian and I have started at Schloss Elmau. This work was supported by the U.S. Department of Energy Grant No. DE - SC0009937 as well as World Premier International (WPI) Initiative, MEXT, Japan.
- 6.K. Inomata, M. Kawasaki, K. Mukaida, Y. Tada, T.T. Yanagida (2016) Google Scholar
- 14.J. Georg, S. Watson, JHEP 09, 138 (2017). https://doi.org/10.1007/JHEP09(2017)138.[JHEP09,138(2017)]ADSCrossRefGoogle Scholar
- 22.E. Cotner, A. Kusenko (2016)Google Scholar
- 24.F. Hasegawa, M. Kawasaki (2018)Google Scholar
- 26.E. Cotner, A. Kusenko, V. Takhistov (2018)Google Scholar