Covariant propagator of the Rarita-Schwinger field in the nuclear medium

C. Korpa, A. E L Dieperink

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A formalism for representing the fully relativistic propagator of the Rarita-Schwinger field in the nuclear medium is developed. Using a convenient basis for expanding the propagator it is shown that it can be represented by 40 energy and momentum dependent quantities which can be decomposed into a 2 × 2 and a 6 × 6 matrix. In this way calculations reduce to matrix multiplication. Using the presented formalism the full relativistically covariant contribution of the pion-nucleon loop to the isobar self energy and propagator in isospin-symmetric spin-saturated nuclear medium is computed. Utilizing this propagator the photoabsorption cross section on in-medium nucleons in the isobar region is calculated and the result compared with experimental data.

Original languageEnglish
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number1
DOIs
Publication statusPublished - Jul 2004

Fingerprint

propagation
isobars
formalism
photoabsorption
matrices
multiplication
nucleons
pions
momentum
energy
cross sections

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Covariant propagator of the Rarita-Schwinger field in the nuclear medium. / Korpa, C.; Dieperink, A. E L.

In: Physical Review C - Nuclear Physics, Vol. 70, No. 1, 07.2004.

Research output: Contribution to journalArticle

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