Proton--induced deuteron breakup at GeV energies with forward emission of a fast proton pair

Physics – Nuclear Physics – Nuclear Experiment

Scientific paper

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17 pages including 6 figures and 1 table v2: minor changes; v3: minor change of author list; v4: changes in accordance with re

Scientific paper

10.1016/S0370-2693(02)03233-1

A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission of a fast proton pair with small excitation energy $E_{pp}<$ 3 MeV has been performed at the ANKE spectrometer at COSY--J\"ulich. An exclusive measurement was carried out at six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35, and 1.9 GeV by reconstructing the momenta of the two protons. The differential cross section of the breakup reaction, averaged up to $8^{\circ}$ over the cm polar angle of the total momentum of the $pp$ pairs, has been obtained. Since the kinematics of this process is quite similar to that of backward elastic $pd \to dp$ scattering, the results are compared to calculations based on a theoretical model previously applied to the $pd \to dp$ process.

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