  An approach to obtain the structural properties of additive binary
hard-sphere mixtures is presented. Such an approach, which is a nontrivial
generalization of the one recently used for monocomponent hard-sphere fluids
[S. Pieprzyk, A. C. Bra\'nka, and D. M. Heyes, Phys. Rev. E 95, 062104 (2017)],
combines accurate molecular-dynamics simulation data, the pole structure
representation of the total correlation functions, and the Ornstein-Zernike
equation. A comparison of the direct correlation functions obtained with the
present scheme with those derived from theoretical results stemming from the
Percus-Yevick (PY) closure and the so-called rational-function approximation
(RFA) is performed. The density dependence of the leading poles of the Fourier
transforms of the total correlation functions and the decay of the pair
correlation functions of the mixtures are also addressed and compared to the
predictions of the two theoretical approximations. A very good overall
agreement between the results of the present scheme and those of the RFA is
found, thus suggesting that the latter (which is an improvement over the PY
approximation) can safely be used to predict reasonably well the long-range
behavior, including the structural crossover, of the correlation functions of
additive binary hard-sphere mixtures.
