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 hydrogentarget has been studied in a high statistics experiment at the COSY-ANKEfacility at a deuteron beam energy of Td = 726 MeV. By selecting two fastprotons at low relative energy E_{pp}, the measured analysing powers and spincorrelations are sensitive to interference terms between specificneutron-proton charge-exchange amplitudes at a neutron kinetic energy of Tn ~1/2 Td =363 MeV. An impulse approximation calculation, which takes into accountcorrections due to the angular distribution in the diproton, describesreasonably the dependence of the data on both E_{pp} and the momentum transfer.This lends broad support to the current neutron-proton partial-wave solutionthat was used in the estimation.