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

C. Korpa, M. F M Lutz, F. Riek

Research output: Contribution to journalArticle

12 Citations (Scopus)

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 πNΔ 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 Δ resonance at nuclear saturation density. The pionic soft modes are much less pronounced than in previous studies.

Original languageEnglish
Article number024901
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number2
DOIs
Publication statusPublished - Aug 7 2009

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isobars
apexes
pions
form factors
scalars
saturation
propagation
shift

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Covariant and self-consistent vertex corrections for pions and isobars in nuclear matter. / Korpa, C.; Lutz, M. F M; Riek, F.

In: Physical Review C - Nuclear Physics, Vol. 80, No. 2, 024901, 07.08.2009.

Research output: Contribution to journalArticle

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