1992/02/21 by Mark Alford, Andrew Strominger · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Cosmology and Gravitation Theories #Fermion #Physics #Quantum electrodynamics #Quantum mechanics #Scattering #hep-th
paper · pdf · doi:10.1103/physrevlett.69.563
published as Phys.Rev.Lett.69:563-566,1992 · 9pp
arxiv created 1992/02/21 · openalex publication_date 1992/07/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We argue that, classically, s-wave electrons incident on a magnetically charged black hole are swallowed with probability one: The reflection coefficient vanishes. However, quantum effects can lead to both electromagnetic and gravitational backscattering. We show that, for the case of extremal, magnetically charged, dilatonic black holes and a single flavor of low-energy charged particles, this backscattering is described by a perturbatively computable and unitary S matrix, and that the Hawking radiation in these modes is suppressed near extremality. The interesting and much more diffiult case of several flavors is also discussed.