2026/02/25 by Soham Acharya, Shuvayu Roy, Sudipta Sarkar
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Cosmology and Gravitation Theories #Gravitational wave background #Primordial black hole #Pulsars and Gravitational Waves Research #Stochastic modelling #Stochastic process
paper · pdf · doi:10.1103/57tq-9sx7
published in Physical review. D/Physical review. D. 114(2) (American Physical Society)
openalex publication_date 2026/06/23 · openalex created_date 2026/06/24 · openalex updated_date 2026/07/28
The search for dark matter candidates includes primordial black holes (PBHs) as possible constituents. Recent studies show that some PBHs can survive to the present epoch by gaining angular momentum through Hawking radiating photons and becoming extremal before complete evaporation. While this provides a plausible model in a two-derivative theory of gravity, additional issues arise in EFT-corrected theories of gravity. In such theories, a rapidly spinning black hole can lead to extremely high tidal forces on a near-horizon observer, with possible observational consequences. In this work, by modeling Hawking radiation as a biased random walk within an EFT of gravity, we show that nearly the same fraction of PBHs survives as in GR. We argue that the resultant near horizon tidal effects should be detectable in future gravitational-wave observables.