Analytic Properties of Thermal Corrected Boson Propagators

Details Analytic Properties of Thermal Corrected Boson Propagators Analytic Properties of Thermal Corrected Boson Propagators

2002-11-28

arxiv.org/abs/hep-ph/0211452v2

Phys.Rev. D67 (2003) 045011

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figures, revtex, typos corrected, two references included, to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.67.045011

We investigate the analytic properties of finite-temperature self-energies of bosons interacting with fermions at one-loop order. A simple boson-fermion model was chosen due to its interesting features of having two distinct couplings of bosons with fermions. This leads to a quite different analytic behavior of the bosons self-energies as the external momentum $K^{\mu}=(k^{0},\vec{k})$ approaches zero in the two possible limits. It is shown that the plasmon and Debye masses are consistently obtained at the pole of the corrected propagator even when the self-energy is analytic at the origin in the frequency-momentum space.

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