Ls. Azhgirey et Np. Yudin, Spin effects in backward deuteron scattering and baryonic degrees of freedom in the deuteron, PHYS ATOM N, 63(12), 2000, pp. 2184-2196
The effect of the baryon-resonance admixture to the deuteron wave function
on the momentum dependences of the differential cross section, the tensor a
nalyzing power T-20, and the polarization-transfer coefficient kappa (0) fo
r backward elastic deuteron-proton scattering at high energies is investiga
ted. The reaction in question is assumed to proceed predominantly through n
ucleon and nucleon-resonance exchanges. The formalism used in this study is
based on light-front dynamics. The effect of various parameters of the pro
blem on the results of the calculations is analyzed, and it is shown that,
even at a 1% level of the total admixture of nucleon resonances to the deut
eron wave function, a description of experimental data that is superior to
that within the one-nucleon-exchange approximation can be achieved by appro
priately choosing the contributions of various resonances. For qualitative
agreement between the results of the calculations and experimental data to
be attained, it is sufficient to take into account the contributions of the
lightest negative-parity baryon resonances. Upon taking into account baryo
n exchanges, results computed for observables with different deuteron wave
functions show a smaller scatter than analogous results obtained within the
one-nucleon-exchange approximation. (C) 2000 MAIK "Nauka/Interperiodica".