Analytic structure of rho meson propagator at finite temperature
High Energy Physics - Phenomenology
2011-01-20 v4 Nuclear Theory
Abstract
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.
Keywords
Cite
@article{arxiv.0911.3504,
title = {Analytic structure of rho meson propagator at finite temperature},
author = {Sabyasachi Ghosh and S. Mallik and Sourav Sarkar},
journal= {arXiv preprint arXiv:0911.3504},
year = {2011}
}