Three-Nucleon Force Studies in Proton-Deuteron Break-Up Reaction with BINA at 190 MeV

The present knowledge of nuclear forces is not sufficient to describe all experimental data for systems which consist of more than two nucleons. Recent three-nucleon scattering experiments have shown that the theoretical models based solely on nucleon-nucleon potentials fail to describe most of the experimental results. In this paper, we present data of the \(\vec {p}+d \longrightarrow p+p+n \) break-up reaction that were obtained using a 190 MeV polarized-proton beam impinging on a liquid deuterium target. The experiment was performed by exploiting BINA (Big Instrument for Nuclear-polarization Analysis), a detector system with a large angular acceptance and a high energy resolution.