Münster 2002 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 8: Plenary Session

HK 8.2: Plenary Talk

Tuesday, March 12, 2002, 09:00–09:30, Plenarsaal

Search for Three-Body Force Effects — •Nasser Kalantar-Nayestanaki — KVI, Groningen, The Netherlands

Three-body forces are, though small, very important in nature. The effect of these forces have far-reaching consequences in many fields of physics. In nuclear physics, a relatively good understanding of most phenomena has been arrived at by only considering two-nucleon forces. However, high precision data emerging are revealing the shortcomings of these forces. In the last few decades, the two-nucleon system has been thoroughly investigated both experimentally and theoretically. These studies have resulted in modern potentials which describe the bulk of the data in a large range of energy. This knowledge can be employed in the Faddeev framework to calculate scattering observables in three-body systems. In regions where the effects of Coulomb force are considered to be small or can be calculated accurately, and energies are low enough to avoid relativistic effects, deviations from experimental data must then be a signature of effects like three-body force effects. Data such as those obtained from elastic and inelastic proton-deuteron scattering can thus provide more information on three-body forces.