A novel soft-photon amplitude is proposed to replace the conventional Low soft-photon amplitude for nucleon-nucleon bremsstrahlung. Its derivation is guided by the standard meson-exchange model of the nucleon-nucleon interaction. This new amplitude provides a superior description of ppγ data. The predictions of this new amplitude are in close agreement with potential-model calculations, which i...

(Dated: May 3, 2004) Abstract It is shown how a bare three–nucleon force is incorporated into the formalism of the effective interaction approach for hyperspherical harmonics. As a practical example we calculate the ground state properties of 3H and 3He using the Argonne V18 nucleon–nucleon potential and the Urbana IX three–nucleon force. A very good convergence of binding energies and matter r...

A procedure is proposed which accounts for final state interaction corrections for near threshold meson production in nucleon-nucleon scattering. In analogy with the Watson-Migdal approximation, it is shown that in the limit of extremely strong final state effects, the amplitude factorizes into a primary production amplitude and an elastic scattering amplitude describing a 3 → 3 transition. Thi...

nuclei singles out the isotopic spin exchange part, Vb• of the neutron-proton interaction inside nuclei. Thus a comparison of the experimental cross section for this reaction with a detailed theoretical calculation of the cross section ought to provide the potential Vb of (2). It is important to note that no one has yet succeeded in calculating the correct absolute magnitude of the cross sectio...

The electromagnetic form factors of the trinucleons 3H and 3He are calculated with wave functions obtained with the Argonne v18 two-nucleon and Urbana IX three-nucleon interactions. Full account is taken of the two-body currents required by current conservation with the v18 interaction as well as those associated with N∆ transition currents and the currents of ∆ resonance components in the wave...

a [ The two nucleon emission process off 3 He induced by medium energy electrons has been theoretically analyzed using realistic three-nucleon wave functions and taking the final state interaction into account. Various kinematical conditions have been considered in order to clarify the question whether the effects of the final state interaction could be minimized by a proper choice of the kinem...

Acknowledgments First and foremost, I wish to express my deep gratitude to my supervisor Fl. Stancu for giving me inspiration and guidance in the research work contained in this thesis. I am very grateful to her for prompt help whenever I needed it. Her professional and human support was so fundamental that it is really hard to estimate what a chance I had meeting her. I would also like to than...

The role of dimensional regularization is discussed and compared with that of cut-off regularization in some quantum mechanical problems with ultraviolet divergence in two and three dimensions with special emphasis on the nucleonnucleon interaction. Both types of renormalizations are performed for attractive divergent oneand two-term separable potentials, a divergent tensor potential, and the s...