2010/08/04 by J. E. Amaro, C. Maieron, M. B. Barbaro +2 · 3 citations
Physics and Astronomy · #Amplitude #Atomic and Subatomic Physics Research #Electron #Fermi gas #Meson #Neutrino Physics Research #Nuclear physics #Nucleon #Particle physics #Perturbation theory (quantum mechanics) #Physics #Pion #Propagator #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Scattering #Scattering amplitude #nucl-th
paper · pdf · doi:10.1103/physrevc.82.044601
published as Phys.Rev.C82:044601,2010 · 14 pages, 15 figures
arxiv created 2010/08/04 · openalex publication_date 2010/10/04 · arxiv updated 2011/11/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Two-particle two-hole contributions to electromagnetic response functions are computed in a fully relativistic Fermi gas model. All one-pion exchange diagrams that contribute to the scattering amplitude in perturbation theory are considered, including terms for pionic correlations and meson-exchange currents (MECs). The pionic correlation terms diverge in an infinite system and thus are regularized by modification of the nucleon propagator in the medium to take into account the finite size of the nucleus. The pionic correlation contributions are found to be of the same order of magnitude as the MECs.