Comments on absorption cross section for Chern-Simons black holes in five dimensions

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In this paper we study the effects of black hole mass on the absorption cross section for a massive scalar field propagating in a 5-dimensional topological Chern-Simons black hole at the low-frequency limit.

• We consider the two branches of black hole solutions $(\alpha=\pm 1)$ and we show that, if the mass of black hole increase the absorption cross section decreases at the zero-frequency limit for the branch $\alpha=-1$ and for the other branch, $\alpha=1$, the behavior is opposite, if the black hole mass increase the absorption cross section increases.
• Also we find that beyond a certain frequency value, the mass black hole does not affect the absorption cross section.