2002/12/31 by M. M. Kaskulov, V. I. Kukulin, P. Grabmayr
Physics and Astronomy · #Current (fluid) #Elementary particle #Hadron #High-Energy Particle Collisions Research #Meson #Nuclear physics research studies #Nucleon #Pion #Quantum Chromodynamics and Particle Interactions #Radiative transfer #nucl-th
paper · pdf · doi:10.1142/s0218301303001375
published as Int.J.Mod.Phys. E12 (2003) 449-478 · 29 pages, 11 figures
arxiv created 2003/06/19 · openalex publication_date 2003/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The radiative capture process np→dγ is considered within the framework of a recently developed six-quark dressed-bag model for the nucleon-nucleon interaction. The calculations presented here include both the nucleon current and the meson-exchange current contributions. The latter uses short-range hadronic form factors for the pion exchange currents consistent with the soft cut-off parameter Λ πNN from the NN-potential. Contributions of the pion exchange current and Δ-isobar current to the total cross-section still cannot explain the discrepancy between the theoretical and experimental cross-sections. Possibilities for new types of meson exchange currents associated with chiral fields inside multi-quark dressed-bag states in nuclei are discussed.