2019/06/11 by Yang Bai, Nicholas Orlofsky · 1 citation
Physics and Astronomy · #hep-ph #astro-ph.CO #astro-ph.HE #hep-th
paper · pdf · doi:10.1103/physrevd.101.055006
published as Phys. Rev. D 101, 055006 (2020) · 9 pages, 1 figure
arxiv created 2019/06/11 · arxiv updated 2020/03/11
We show that primordial (nearly) extremal black holes with a wide range of masses from the Planck scale to around 109 g could be cosmologically stable and explain dark matter, given a dark electromagnetism and a heavy dark electron. For individual black holes, Hawking radiation and Schwinger discharge processes are suppressed by near-extremality and the heaviness of the dark electron, respectively. In contrast, the merger events of binary systems provide an opportunity to directly observe Hawking radiation. Because the merger products are not extremal, they rapidly evaporate and produce transient high-energy neutrino and gamma ray signals that can be observed at telescopes like IceCube and HAWC. The relationship between the near-extremal black hole and dark electron masses could also shed light on the weak gravity conjecture.