2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46486In hard interactions between external particles incident on a heat-bath, we show that large logarithms are generated when a radiated or absorbed gauge boson is collinear with the initial fermion momentum. These logarithms can be absorbed into process independent splitting/absorption probabilities. Unlike the zero-temperature case, however, they depend explicitly on the temperature and the scale of the interaction.LaTeX source; 9 pages including 1 figureHigh Energy Physics - Phenomenologytext