Leading and subleading logarithmic QCD corrections in bilinear heavy-quark currents.

We present a complete calculation of the two-loop anomalous dimension and the corresponding Wilson coefficient for bilinear currents of heavy quarks. For momentum transfers [minus][infinity][lt][ital q][sup 2][le]([ital m][sub 1][minus][ital m][sub 2])[sup 2] our result agrees with the existing calculation of Korchemsky and Radyushkin. In addition, we give the result for the anomalous dimension and the Wilson coefficient for ([ital m][sub 1]+[ital m][sub 2])[sup 2][le][ital q][sup 2][lt][infinity].