Polarized Proton Pionic Capture in Deuterium as a Probe of 3N Dynamics

Abstract

The proton analyzing power Ay in pion production reaction pd --> pi0 3He has been calculated including one- and two-body meson production mechanisms with a proper treatment of the three-nucleon dynamics and an accurate solution of the 3N bound-state problem for phenomenological two-nucleon potentials. In the region around the Delta resonance, the structure of the analyzing power can be understood once interference effects among amplitudes describing intermediate Delta N formation in different orbital states are considered along with the additional interference with the S-wave pion production amplitudes. Then, the inclusion of three-nucleon dynamics in the initial state produces the structure of the analyzing power that has been observed experimentally.

arXiv comment9 pages, 5 figures

References in corpus (6)

• Meson production in nucleon--nucleon collisions close to the threshold
• Off shell pi N amplitude and the p p->p p pi0 reaction
• The pd <--> pi+ t reaction around the Delta resonance
• Spin observables for the pd <-> pi+ t process around the Delta resonance
• Isoscalar off-shell effects in threshold pion production from pd collisions
• pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms

Cited by in corpus (3)

• Relativistic interactions for the meson-two-nucleon system in the clothed-particle unitary representation
• Pion absorption from the lowest atomic orbital in 2H, 3H and 3He
• Backward single-pion production in the $\mathbf{pd}\to {}^3\text{He}{\mathbf{\pi }}^0$ reaction with WASA-at-COSY