Publication Date:
2020-10-01
Description:
A measurement of the analyzing powers for the $$^2hbox {H}(vec {p},pp)n$$ 2 H ( p → , p p ) n break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of $$135,hbox {MeV}$$ 135 MeV . The scattering angles and energies of the final-state protons were measured using the Big Instrument for Nuclear-polarization Analysis (BINA) with a nearly $$4pi $$ 4 π geometrical acceptance. In this work, we analyzed a large number of kinematical geometries including forward–forward configurations in which both the final-state particles scatter to small polar angles and backward–forward configurations in which one of the final-state particles scatters to large polar angles. The results are compared with Faddeev calculations based on modern nucleon–nucleon (NN) and three-nucleon (3N) potentials. Discrepancies between polarization data and theoretical predictions are observed for configurations corresponding to small relative azimuthal angles between the two final-state protons. These configurations show a large sensitivity to 3N force effects.
Print ISSN:
1434-6001
Electronic ISSN:
1434-601X
Topics:
Physics
Permalink