The pd <--> pi+ t reaction around the Delta resonance

Abstract

The pd <--> pi+ t process has been calculated in the energy region around the Delta-resonance with elementary production/absorption mechanisms involving one and two nucleons. The isobar degrees of freedom have been explicitly included in the two-nucleon mechanism via pi-- and rho-exchange diagrams. No free parameters have been employed in the analysis since all the parameters have been fixed in previous studies on the simpler pp <--> pi+ d process. The treatment of the few-nucleon dynamics entailed a Faddeev-based calculation of the reaction, with continuum calculations for the initial p-d state and accurate solutions of the three-nucleon bound-state equation. The integral cross-section was found to be quite sensitive to the NN interaction employed while the angular dependence showed less sensitivity. Approximately a 4% effect was found for the one-body mechanism, for the three-nucleon dynamics in the p-d channel, and for the inclusion of a large, possibly converged, number of three-body partial states, indicating that these different aspects are of comparable importance in the calculation of the spin-averaged observables.

40 Pages, RevTex, plus 5 PostScript figures

References in corpus (1)

• Photodisintegration of the triton with realistic potentials

Cited by in corpus (13)

• Relativistic interactions for the meson-two-nucleon system in the clothed-particle unitary representation
• Three-body properties in hot and dense nuclear matter
• Simultaneous Measurements of the $p+d\to (A=3)+\pi$ Reactions
• Why is the three-nucleon force so odd?
• Photonuclear Reactions of Three-Nucleon Systems
• Photodisintegration of three- and four- nucleon systems
• Nuclear effects in positive pion electroproduction on the deuteron near threshold
• Radiative capture of protons by deuterons
• Triton photodisintegration with realistic potentials
• Spin observables for the pd <-> pi+ t process around the Delta resonance
• Isoscalar off-shell effects in threshold pion production from pd collisions
• Polarized Proton Pionic Capture in Deuterium as a Probe of 3N Dynamics
• pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms