Short-range NN-properties in the processes $pd\to dp$ and $pd\to (pp)n$

Abstract

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

3 pages, Latex, 1 postscript figure; talk given at International Conference on Quark Nuclear Physics, (June 9-14 June, 2002, Juelich, Germany)

References in corpus (6)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Proton--induced deuteron breakup at GeV energies with forward emission of a fast proton pair
• A Possibility to Observe Short-Range NN Properties in the Deuteron Breakup $pd\to ppn$
• Model-independent analysis of the neutron-proton final-state interaction region in the pp -> pn pi^+ reaction
• Spin-triplet final-state dominance in the pp -> pn pi+ reaction at 492 MeV
• Singlet-to-triplet ratio in the deuteron breakup reaction $pd\to pnp$ at 585 MeV

Cited by in corpus (1)

• Energy dependence of forward 1S0 diproton production in the pp -> pp pi0 reaction