Study of Three-Nucleon Dynamics in the dp Breakup Collisions Using the WASA Detector

Abstract

An experiment to investigate the (formula presented)H(d, pp)n breakup reaction using a deuteron beam of 300, 340, 380 and 400 MeV and the WASA detector has been performed at the Cooler Synchrotron COSY-Jülich. As a first step the data collected at the beam energy of 340 MeV are analysed, with a focus on the proton-proton coincidences registered in the Forward Detector. The differential cross section is determined for 189 configurations on a dense angular grid defined by the emission angles of the two outgoing protons: two polar angles (formula presented) and (formula presented) (in the range between 5(formula presented) and 15(formula presented) with the step size of 2(formula presented)) and the relative azimuthal angle (formula presented) (in the range from 20(formula presented) to 180(formula presented), with the step size of 20(formula presented)).The cross section data are compared to theoretical predictions based on the state-of-the-art nucleon-nucleon potentials, combined with three-nucleon force, Coulomb interaction or carried out in a relativistic regime.