Self-consistent Green's function calculation of the nucleon mean free path

The extension of Green's functions techniques to the complex energy plane provides access to fully dressed quasiparticle properties from a microscopic perspective. Using self-consistent ladder self-energies, we find both spectra and lifetimes of such quasiparticles in nuclear matter. With a consistent choice of the group velocity, the nucleon mean-free path can be computed. Our results indicate that, for energies above 50?MeV at densities close to saturation, a nucleon has a mean-free path of 4 to 5?fm.