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Infrared Sensitivity in Damping Rate for Very Soft Moving Fermions in Finite Temperature QED

A. Abada·K. Bouakaz
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Abstract

We calculate the fermion damping rate to second order in powers of the external momentum $p$ in the context of QED at finite temperature using the hard-thermal-loop (HTL) summation scheme. We find that the coefficient of order $p^{2}$ is divergent in the infrared whereas the two others are finite. This result suggests that the htl-based pertubation is infrared sensitive at next-to-leading order.

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A. Abada, K. Bouakaz. 2002-09-21. Infrared Sensitivity in Damping Rate for Very Soft Moving Fermions in Finite Temperature QED. https://arxiv.org/abs/hep-ph/0209246

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