1998/01/06 by E. Bauer
Chemistry · Engineering · Physics and Astronomy · #Advanced NMR Techniques and Applications #Engineering #Nuclear Physics and Applications #Nuclear physics #Nuclear physics research studies #Physics #Structural engineering #Transverse plane #nucl-th
paper · pdf · doi:10.1016/s0375-9474(98)00235-8
published as Nucl.Phys. A637 (1998) 243-279 · 42 pages, 18 Postscript figures
arxiv created 1998/01/06 · openalex publication_date 1998/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The transverse nuclear response to an electromagnetic probe which is limited to create (or destroyed) a particle-hole (ph) or delta-hole (Δh) pair is analyzed. Correlations of the random phase approximation (RPA) type and self energy insertions are considered. For RPA correlations we have developed a scheme which includes explicitly the Δ and the exchange terms. Self energy insertions over ph and Δh bubbles are studied. Several residual interactions based on a contact plus a (π+ ρ)-meson exchange potential are used. All calculations are performed in non-relativistic nuclear matter. The main effect of the Δ is to reduce the intensity over the nuclear quasi-elastic peak. Exchange RPA terms are very important, while the self energy depends strongly on the residual interaction employed. We compare our final result with data for 40Ca at momentum transfer q=410 and q=550 MeV/c.