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HK: Fachverband Hadronen und Kerne

HK 32: Few-body physics

HK 32.3: Vortrag

Dienstag, 17. März 2009, 14:45–15:00, H-ZO 100

Study of three-nucleon force effects in p^→+d break-up at 135 MeV — •Mohammad Eslami-Kalantari — KVI, Groningen, The Netherlands — Yazd University, Yazd , Iran

Understanding the exact nature of the nuclear force is one of the long-standing questions in nuclear physics. Nowadays, the progress of exploring the nuclear force in both the theoretical and experimental fronts is remarkable. On the experimental side, high precision measurements provide large sets of data which allow a systematic study of physical phenomena such as the three-nucleon force (3NF), the Coulomb force, and relativistic effects for a large range of energies. From the theoretical side, different approaches such as Chiral-perturbation, partial wave analysis, and meson exchange potentials supply a detailed description of these phenomena.

High-precision measurements of the break-up proton-deuteron reaction have been performed in the past at KVI and elsewhere with the aim to study three-nucleon force effects. In the present work, we explored 3NF effects in the break-up scattering process by performing a measurement of vector analyzing powers and differential cross sections using a 135 MeV polarized-proton beam impinging on a liquid-deuterium target. For this study, we explored a new experimental set-up, Big Instrument for Nuclear-polarization Analysis, BINA, which covers almost the entire kinematic phase space of the break-up reaction. The results are interpreted with the help of state-of-the-art Faddeev calculations.