====== TTP95-10 RADIATION OF LIGHT FERMIONS IN HEAVY FERMION PRODUCTION ====== The rate for the production of a pair of massive fermions in $e^+ e^-$ annihilation plus real or virtual radiation of a pair of massless fermions is calculated analytically. The contributions for real and virtual radiation are displayed separately. The asymptotic behaviour close to threshold and for high energies is given in a compact form. These approximations provide arguments for the appropriate choice of the scale in the ${\cal O}(\alpha)$ result, such that no large logarithms remain in the final answer. |**A.H. Hoang, J.H. K\"uhn and T. Teubner,** | |** Nucl. Phys. B452 173-187 1995 ** | | {{preprints:1995:ttp95-10.pdf|PDF}} {{preprints:1995:ttp95-10.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9505262|arXiv]] | | |