Stability of Galileon Black Holes Under Spinorial Perturbations

摘要

In this work we consider the interaction of gravity with matter fields with galilean invariance and their corresponding black hole solution. Quasinormal modes of spinorial perturbations were computed using different methods. For massless spinors we show that black holes are dynamically stable even in cases where the potential has a small negative region. This is possible because the ground state always has an energy larger than well's depth. We also found quasi-resonant modes in certain regime, which we believe correspond to a manifestation of the Klein paradox.