Analysing powers and spin correlations in deuteron-proton charge exchange at 726 MeV

摘要

The charge exchange of vector polarised deuterons on a polarised hydrogen target has been studied in a high statistics experiment at the COSY-ANKE facility at a deuteron beam energy of T-d=726 MeV. By selecting two fast protons at low relative energy E-pp, the measured analysing powers and spin correlations are sensitive to interference terms between specific neutron-proton charge-exchange amplitudes at a neutron kinetic energy of T-n approximate to 1/2T(d)= 363 MeV. An impulse approximation calculation, which takes into account corrections due to the angular distribution in the diproton, describes reasonably the dependence of the data on both E-pp and the momentum transfer. This lends broad support to the current neutron-proton partial wave solution that was used in the estimation. (C) 2015 The Authors. Published by Elsevier B.V.