====== TTP94-11 Radiation of Heavy Quarks, ====== The rate for the production of massive fermions radiated off a pair of massless fermions is calculated analytically. Combined with the analytic calculation of the corresponding virtual contribution one obtains the order $\alpha^2$ correction to the cross section which is induced by the real and virtual radiation of a pair of massive fermions by massless fermions. Approximations valid for large and for small masses are derived and shown to agree with earlier calculations. |**A.H. Hoang, M. Je\.zabek, J.H. K\"uhn and T. Teubner,** | |** Phys. Lett. B338 330-335 1994 ** | | {{preprints:1994:ttp94-11.pdf|PDF}} {{preprints:1994:ttp94-11.ps|PostScript}} | | |