  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.
