Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-02-25
Nucl.Phys. A740 (2004) 287-308
Physics
Nuclear Physics
Nuclear Theory
24 pages, 28 figures
Scientific paper
10.1016/j.nuclphysa.2004.05.010
We study the influence of the virtual pion cloud in nuclear matter at finite densities and temperatures on the structure of the rho- and omega-mesons. The in-matter spectral function of the pion is obtained within a selfconsistent scheme of coupled Dyson equations where the coupling to the nucleon and the Delta(1232)-isobar resonance is taken into account. The selfenergies are determined using a two-particle irreducible (2PI) truncation scheme (Phi-derivable approximation) supplemented by Migdal's short range correlations for the particle-hole excitations. The so obtained spectral function of the pion is then used to calculate the in-medium changes of the vector-meson spectral functions. With increasing density and temperature a strong interplay of both vector-meson modes is observed. The four-transversality of the polarisation tensors of the vector-mesons is achieved by a projector technique. The resulting spectral functions of both vector-mesons and, through vector dominance, the implications of our results on the dilepton spectra are studied in their dependence on density and temperature.
Knoll Joern
Riek Felix
No associations
LandOfFree
Self-consistent description of vector-mesons in matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Self-consistent description of vector-mesons in matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-consistent description of vector-mesons in matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-485107