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28 May 2022
  » arxiv » nucl-th/9304005

 Article overview

The Delta-Hole model at Finite Temperature
P.A.Henning ; H.Umezawa ;
Date 8 Apr 1993
Journal Nucl.Phys. A571 (1994) 617-644
Subject nucl-th
AbstractThe 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.
Source arXiv, nucl-th/9304005
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