Stimulated Axion Decay in Superradiant Clouds around Primordial Black Holes
The superradiant instability can lead to the generation of extremely dense axion clouds around rotating black holes. We show that, despite the long lifetime of the QCD axion with respect to spontaneous decay into photon pairs, stimulated decay becomes significant above a minimum axion density and le...
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| Format: | article |
| Language: | eng |
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2018
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| Online Access: | http://hdl.handle.net/10773/24054 |
| Country: | Portugal |
| Oai: | oai:ria.ua.pt:10773/24054 |