Absorption and scattering of massless scalar waves by black holes in quasi-topological gravity

Abstract

We consider massless scalar field perturbations of regular black holes in quasi-topological gravity. After reviewing various regular black hole solutions, we compute the total absorption cross-section and the partial absorption cross-section for different choices of the parameters using the partial wave method. The results show that the larger the parameter $\alpha$, introduced in the context of quasi-topological gravity, the smaller the total absorption cross-section. In addition, we find that the influence of the space-time dimension $D$ on the absorption and scattering of massless scalar waves in this set of regular black holes differs from earlier computations.

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