Covariant and self consistent vertex corrections for pions and isobars in nuclear matter

Abstract

We evaluate the pion and isobar propagators in cold nuclear matter self consistently applying a covariant form of the isobar-hole model. Migdal's vertex correction effects are considered systematically in the absence of phenomenological soft form factors. Saturated nuclear matter is modeled by scalar and vector mean fields for the nucleon. It is shown that the short-range dressing of the pi N Delta vertex has a significant effect on the pion and isobar properties. Using realistic parameters sets we predict a downward shift of about 50 MeV for the Delta resonance at nuclear saturation density. The pionic soft modes are much less pronounced than in previous studies.

21 pages, 8 figures

References in corpus (13)

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• Photoabsorption off nuclei with self consistent vertex corrections
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Cited by in corpus (13)

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• Isospin-dependent pion in-medium effects on charged pion ratio in heavy ion collisions
• On kinematical constraints in boson-boson systems
• Superfluid nucleon matter in and out of equilibrium and weak interactions
• Photoabsorption off nuclei with self consistent vertex corrections
• Structure formation during phase transitions in strongly interacting matter
• QCD sum rules for the $\Delta$ isobar in neutron matter
• On kinematical constraints in the hadrogenesis conjecture for the baryon resonance spectrum
• Medium effects on charged pion ratio in heavy ion collisions
• Effects of consistent and inconsistent isobar coupling in the nuclear medium
• Nuclear Drell-Yan effect in a covariant model
• Selfconsistent descriptions of vector-mesons in hot matter revisited