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

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

2002-09-21

arxiv.org/abs/hep-ph/0209246v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, contribution to QM2002, 18-24 july 2002, Nantes, France

Scientific paper

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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