Deuteron Breakup pd\to pnp in Specific Kinematics and Short-Range NN-Interaction

Abstract

Deuteron breakup processes $p+d\to (NN{)}_{s,t}+N$ are studied in the kinematics of backward elastic pd-scattering at law relative momenta of the NN-pair $k\sim 0-50MeV/c$ for initial energies $T_0=0.5-2.5GeV$ in the framework of the known mechanisms of the $pd\to dp$ process including rescatterings in the initial and final states. A considerable suppression of the $\Delta -$ and $N^{\ast }-$ isobar excitation mechanisms is found for the production of the singlet $(NN{)}_s$-pair. As a result, one nucleon exchange mechanism can be identified in the cross section and polarization observables by the node of the half-off-shell NN$({}^1{S}_0)$-scattering amplitude, $t(q,k)$, at $q\sim 0.4$ GeV/c.

Comments: 13 pages, Latex, 4 Postscript figures; Replacement of the caption for Fig.3 and new Fig.4