The Collective Excitation Spectra of $σ, ω$ and $π$ Mesons in Nuclear Matter

Details The Collective Excitation Spectra of $σ, ω$ and $π$ Mesons in Nuclear Matter The Collective Excitation Spectra of $σ, ω$ and $π$ Mesons in Nuclear Matter

1999-01-27

arxiv.org/abs/nucl-th/9901085v1

Commun.Theor.Phys.32:567-574,1999

Physics

Nuclear Physics

Nuclear Theory

14 pages, 6 eps file, Latex; Talk at the Symposium of the Thermo Field Dynamics and its application, May 5-8, CCAST, Beijing,

Scientific paper

The recent progress on the study of the collective excitation in relativistic nuclear matter is reviewed. The collective excitation modes are derived by meson propagators in nuclear matter. The mesons we study are $\sigma, \omega, \gamma$ and $\pi$ mesons. For pion, we derived not only the relativistic particle - hole, delta - hole excitations but also antiparticle excitations, such as particle - antiparticle, antidelta - particle, delta - antiparticle excitations. By calculating the dispersion relation and the spin - isospin dependent response function, the effects of all these excitation are studied.

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