Collinear Divergences at One-loop Order for External Particles in a Heat-bath

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In 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 figure

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/46486

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/9609407
 http://arxiv.org/abs/hep-ph/9609407

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arXiv