Abstract
Precise and large set of cross sections, vector A x , A y and tensor A xx , A xy , A yy analyzing powers for the 1 H(d, pp)n breakup reactions were measured at 100 and 130 MeV deuteron beam energies with the use of the SALAD and BINA detectors at KVI and Germanium Wall setup at FZ-Jülich. Results are compared with various theoretical approaches which model the three-nucleon (3N) system dynamics. The calculations are based on different two-nucleon (2N) potentials which can be combined with models of the three-nucleon force (3NF) and other pieces of the dynamics can also be included like the Coulomb interaction and relativistic effects. The cross sections data reveal seizable 3NF and Coulomb force influence. In case of analyzing powers very low sensitivity to the effects was found and the data are well describe by 2N models only. At 130 MeV for A xy serious disagreements appear when 3NF models are included into calculations.
Highlights
One of the key issues of modern nuclear physics is investigation of forces acting between nucleons
The 1 H (d, pp)n breakup reactions were studied in different phase space regions with the use of three detection systems: the SALAD and BINA at KVI [8,9,10,11] and the Germanium Wall (GeWall) at FZ-Jülich [12]
Additional set of the cross sections for the same beam energy were obtained for 145 geometries with the GeWall detector [12]
Summary
One of the key issues of modern nuclear physics is investigation of forces acting between nucleons. The interaction models are created based on the meson exchange theory or phenomenology. These so-called realistic NN potentials, like CD Bonn, Nijmegen or Argonne AV18 are able to predict observables for 2N systems with very high precision. To test thoroughly these models, environement with more than just two nucleons is needed. The simplest and nontrivial one is the 3N system, which can be studied in details with the use of the deuteron breakup reaction. The reaction with its 3N final state offers very simple and unique laboratory in which even very subtle dynamical effects like the 3NF, Coulomb force or relativistic component can be studied
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