Absorption of massless scalar wave by high-dimensional Lovelock black hole

In this Letter we investigate the absorption of a massless scalar field propagating in a static and spherically symmetric five-dimensional (5D) Lovelock black hole spacetime. We give out the analytical and numerical results of partial and total absorption cross sections of the massless scalar wave in detail. we find that when the wavelength of the incoming wave is much smaller than the black hole horizon, the absorption cross section oscillates and tends to the geometry-optical limit of σabshf=πbc2 which is similar to the electromagnetic wave, Fermion wave by the Schwarzschild black hole, massless scalar wave in Reissner-Nordström black hole and the minimally-coupled massless scalar wave by stationary black hole spacetimes. On the other hand, we investigate effects of two parameters α and Λ of the 5D Lovelock black hole on the absorption cross sections. We also find that higher value of the coupling constant α corresponding to lower total absorption cross section and higher value of Λ corresponding to higher total absorption cross section.