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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 | | 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. | | Source: | arXiv, nucl-th/9304005 | | Services: | Forum | Review | PDF | Favorites | |
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