Analytic structure of rho meson propagator at finite temperature

Details Analytic structure of rho meson propagator at finite temperature Analytic structure of rho meson propagator at finite temperature

2009-11-18

arxiv.org/abs/0911.3504v4

Eur.Phys.J.C70:251-262,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1140/epjc/s10052-010-1446-8

We analyse the structure of one-loop self-energy graphs for the rho meson in real time formulation of finite temperature field theory. We find the discontinuities of these graphs across the unitary and the Landau cuts. These contributions are identified with different sources of medium modification discussed in the literature. We also calculate numerically the imaginary and the real parts of the self-energies and construct the spectral function of the rho meson, which are compared with an earlier determination. A significant contribution arises from the unitary cut of the pi-omega loop, that was ignored so far in the literature.

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