pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms

Details pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms

1998-01-16

arxiv.org/abs/nucl-th/9801028v1

Phys.Rev.C58:1929-1936,1998

Physics

Nuclear Physics

Nuclear Theory

14 pages, REVTeX, plus 6 figs., Postscript

Scientific paper

10.1103/PhysRevC.58.1929

The large variety of experimental data around the pion-production threshold are compared with a meson-exchange isobar model which includes the pion-nucleon interaction in s-- and p-waves. Theoretical results obtained with two different NN potentials (Bonn and Paris) indicate that the behavior of the excitation function at threshold is sensitive to the details of the NN correlations. The complete model presented, while developed originally to reproduce the reaction around the Delta resonance, is shown to describe well the integral (Coulomb-corrected) cross-section at threshold along with its angular distribution. At low energies the angular dependence of the analyzing power Ay0 is well reproduced also. Finally, the energy dependence of the analyzing power for theta=90 from threshold up to the Delta resonance is considered and discussed.

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