Primordial black hole dark matter from catastrogenesis with unstable pseudo-Goldstone bosons
| Autor: | Gelmini, Graciela B., Hyman, Jonah, Simpson, Anna, Vitagliano, Edoardo |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | JCAP06(2023)055 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2023/06/055 |
| Popis: | We propose a new scenario for the formation of asteroid-mass primordial black holes (PBHs). Our mechanism is based on the annihilation of the string-wall network associated with the breaking of a $U(1)$ global symmetry into a discrete $Z_N$ symmetry. If the potential has multiple local minima ($N>1$) the network is stable, and the annihilation is guaranteed by a bias among the different vacua. The collapse of the string-wall network is accompanied by catastrogenesis, a large production of pseudo-Goldstone bosons (pGBs) -- e.g. axions, ALPs, or majorons -- gravitational waves, and PBHs. If pGBs rapidly decay into products that thermalize, as predicted e.g. in the high-quality QCD axion and heavy majoron models, they do not contribute to the dark matter population, but we show that PBHs can constitute 100\% of the dark matter. The gravitational wave background produced by catastrogenesis with heavy unstable axions, ALPs, or majorons could be visible in future interferometers. Comment: 24 pages, 4 figures. Matches published version |
| Databáze: | arXiv |
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