Infrared Sensitivity in Damping Rate for Very Soft Moving Fermions in Finite Temperature QED
Abstract
Description
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.
4 pages, contribution to QM2002, 18-24 july 2002, Nantes, France
4 pages, contribution to QM2002, 18-24 july 2002, Nantes, France