2002/05/07 by G. Caia, George Caia, J. W. Durso +5
Physics and Astronomy · #Amplitude #Boson #Chiral perturbation theory #Coupling (piping) #Coupling constant #Mathematical physics #Meson #Nuclear physics research studies #Particle physics #Particle physics theoretical and experimental studies #Perturbation theory (quantum mechanics) #Physics #Pion #Pseudoscalar #Pseudovector #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #nucl-th
paper · pdf · doi:10.1103/physrevc.66.044006
published as Phys.Rev. C66 (2002) 044006 · 24 pages, 4 figures
arxiv created 2002/05/07 · openalex publication_date 2002/10/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine the effects of pseudoscalar and pseudovector coupling of the \ensuremathπ and \ensuremathη mesons in one-boson exchange models of the NN interaction using two approaches: time-ordered perturbation theory unitarized with the relativistic Lippmann-Schwinger equation, and a reduced Bethe-Salpeter approach using the Thompson equation. Contact terms in the one-boson exchange amplitudes in time-ordered perturbation theory lead naturally to the introduction of s-channel nucleonic cutoffs for the interaction, which strongly suppresses the far off-shell behavior of the amplitudes in both approaches. Differences between the resulting NN predictions of the various models are found to be small, and particularly so when coupling constants of the other mesons are readjusted within reasonable limits.