Consistency between pion exchange currents andN−Npotential in doubly radiativen−pcapture
- 1 May 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 21 (5), 1921-1931
- https://doi.org/10.1103/physrevc.21.1921
Abstract
The consistency between the exchange currents in the pionic range and the Reid soft-core potential, which has an asymptotic beahvior like , is studied in the doubly radiative capture process. The cross section is evaluated using the interaction Hamiltonian expressed by means of the nuclear current, that includes the two-body terms deriving from one-pion exchange. The gauge invariance is preserved by the generalized contact term. This cross section is compared to that obtained with the Siegert form of the interaction Hamiltonian. The difference between the values of the cross section, which is of the order of 24%, constitutes a quantitative estimate of the lack of consistency between pion exchange currents and the nuclear potential considered. The use of purely phenomenological wave functions leads to a great disagreement. Finally, the existence of an exchange effect of the order of 30% is pointed out in the process under examination, which occurs via the emission of two photons.
Keywords
This publication has 32 references indexed in Scilit:
- Siegert's theorem revisited: Applications to the forward angle cross section and the sum rule for 2H (γ,n)pPhysics Letters B, 1979
- Two-quantum radiative thermal neutron capture inH1Physical Review C, 1979
- Some comments on the n + p → D + 2γ anomalyPhysics Letters B, 1975
- Discrepancy in the doubly radiative neutron-proton capturePhysics Letters B, 1975
- An anomaly in the reaction n + p → D + 2γPhysics Letters B, 1975
- Observation of Two-Photon Decay inCapturePhysical Review Letters, 1975
- Meson exchange effects in n + p → d + γPhysics Letters B, 1972
- Local phenomenological nucleon-nucleon potentialsAnnals of Physics, 1968
- Inelastic Electron-Deuteron Scattering Cross Sections at High Energies. II. Final-State Interactions and Relativistic CorrectionsPhysical Review B, 1961
- Consequences of Guage Invariance for Radiative TransitionsPhysical Review B, 1951