2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194779The evaluation of the absorption cross section of a massless scalar field propagating on a non-extremal black D3-brane smeared on a circle is considered. The solution to the scalar field equation of motion at high temperature is obtained in terms of the parameters $λ=3ω/4πT$ and $k$, which denote the frequency and the momentum along the circle respectively while $T$ denotes the temperature of the black brane. Based on a perturbative scheme, higher order temperature corrections to the scalar absorption cross section are computed. Further, interesting analogies with the cross section of known black branes solutions are discussed.13 pages; v2 errors in the absorption cross section formulas corrected, few typos corrected, improved discussion regarding our results, version to appear in JHEPHigh Energy Physics - Theorytext