A. Deltuva

Momentum-space treatment of the Coulomb interaction in three-nucleon reactions with two protons

The Coulomb interaction between two protons is included in the calculation of proton-deuteron elastic scattering, radiative proton-deuteron capture, and two-body electromagnetic disintegration of

Systematic study of three-nucleon force effects in the cross section of the deuteron-proton breakup at 130 MeV

^{3}\mathrm{He}

Four-nucleon scattering: Ab initio calculations in momentum space

. The hadron dynamics is based on the purely nucleonic charge-dependent (CD) Bonn potential and its realistic extension CD Bonn

Ab initio four-body calculation of n - He 3 , p - H 3 , and d - d scattering

+\phantom{\rule{0.3em}{0ex}}\ensuremath{\Delta}

Benchmark calculation for proton-deuteron elastic scattering observables including the Coulomb interaction

to a coupled-channel two-baryon potential, allowing for single virtual

Trinucleon photonuclear reactions withΔ-isobar excitation: Processes below pion-production threshold

\ensuremath{\Delta}

Four-nucleon system with Δ-isobar excitation

-isobar excitation. Calculations are done using integral equations in momentum space. The screening and renormalization approach is employed for including the Coulomb interaction. Convergence of the procedure is found at moderate screening radii. The reliability of the method is demonstrated. The Coulomb effect on observables is seen at low energies for the entire kinematic regime. In proton-deuteron elastic scattering at higher energies the Coulomb effect is confined to forward scattering angles; the

Momentum-space calculation of proton-deuteron scattering including Coulomb and irreducible three-nucleon forces

\ensuremath{\Delta}

New calculation schemes for proton-deuteron scattering including the Coulomb interaction

-isobar effect found previously remains unchanged by the Coulomb effect. In electromagnetic reactions the Coulomb effect competes with other effects in a complicated way.

Three-body description of direct nuclear reactions: Comparison with the continuum discretized coupled channels method

High-precision cross-section data of the deuteron-proton breakup reaction at 130 MeV are presented for 72 kinematically complete configurations. The data cover a large region of the available phase space, divided into a systematic grid of kinematical variables. They are compared with theoretical predictions, in which the full dynamics of the three-nucleon (3N) system is obtained in three different ways: realistic nucleon-nucleon (NN) potentials are combined with model 3N forces (3NFs) or with an effective 3NF resulting from explicit treatment of the Delta-isobar excitation. Alternatively, the chiral perturbation theory approach is used at the next-to-next-to-leading order with all relevant NN and 3N contributions taken into account. The generated dynamics is then applied to calculate cross-section values by rigorous solution of the 3N Faddeev equations. The comparison of the calculated cross sections with the experimental data shows a clear preference for the predictions in which the 3NFs are included. The majority of the experimental data points are well reproduced by the theoretical predictions. The remaining discrepancies are investigated by inspecting cross sections integrated over certain kinematical variables. The procedure of global comparisons leads to establishing regularities in disagreements between the experimental data and the theoretically predicted values of the cross sections. They indicate deficiencies still present in the assumed models of the 3N system dynamics.