The Delta-Hole model at Finite Temperature
Nuclear Theory
2009-10-22 v1
Abstract
The spectral function of pions interacting with a gas of nucleons and Delta-33-resonances is investigated using the formalism of Thermo Field Dynamics. After a discussion of the zero Delta-width approximation at finite temperature, we take into account a constant width of the resonance. Apart from a full numerical calculation, we give analytical approximations to the pionic spectral function including such a width. They are found to be different from previous approximations, and require an increase of the effective Delta-width in hot compressed nuclear matter. The results are summarized in an effective dispersion relation for interacting pions.
Cite
@article{arxiv.nucl-th/9304005,
title = {The Delta-Hole model at Finite Temperature},
author = {P. A. Henning and H. Umezawa},
journal= {arXiv preprint arXiv:nucl-th/9304005},
year = {2009}
}
Comments
34 pages in standard LaTeX GSI-preprint No. GSI-93-23