Short-range NN properties in the processes pd→dp and pd →(pp)n

The data from the first measurement, performed at ANKE/COSY, of the unpolarized cross-section of the reaction pd →(pp)n in the kinematics of backward elastic pd →dp scattering at proton beam energies between 0.6 and 1.9 GeV are analyzed in a phenomenological approach. The pd →(pp)n data and the triplet cross-section of the reaction pd→(pn)p, calculated from the pd →dp data on the basis of the Faeldt-Wilkin extrapolation, are used here to derive the ratio ζ of the singlet production matrix element squared to the triplet one. This ratio, defined in our earlier analysis of pd→(pn)p data in a largely model-independent way, depends on the dynamics of the pd interaction. We find here ζ∼0.02 and show that the smallness of this value may point toward softness of the deuteron at short NN distances. (orig.)