The one-pion-exchange three-nucleon force and the $A_y$ puzzle

Abstract

We consider a new three-nucleon force generated by the exchange of one pion in the presence of a 2N correlation. The underlying irreducible diagram has been recently suggested by the authors as a possible candidate to explain the puzzle of the vector analyzing powers $A_y$ and $i{T}_{11}$ for nucleon-deuteron scattering. Herein, we have calculated the elastic neutron-deuteron differential cross section, $A_y$, $i{T}_{11}$, $T_{20}$, $T_{21}$, and $T_{22}$ below break-up threshold by accurately solving the Alt-Grassberger-Sandhas equations with realistic interactions. We have also studied how $A_y$ evolves below 30 MeV. The results indicate that this new 3NF diagram provides one possible additional contribution, with the correct spin-isospin structure, for the explanation of the origin of this puzzle.

revised version: We have also studied how Ay evolves below 30 MeV, 4 Pages (twocolumn), 2 figures, uses psfig, RevTeX

References in corpus (6)

• Phenomenological spin-orbit three-body force
• New Three-Nucleon-Force Terms in the Three-Nucleon System
• Why is the three-nucleon force so odd?
• The Role of Meson Retardation in the NN Interaction above Pion Threshold
• Comparison of triton bound state properties using different separable representations of realistic potentials
• Practical approximation scheme for the pion dynamics in the three-nucleon system

Cited by in corpus (8)

• Proton-${}^3$He elastic scattering at low energies
• Low energy $n-\nuc{3}{H}$ scattering : a novel testground for nuclear interaction
• Proton-Deuteron Elastic Scattering from 2.5 to 22.5 MeV
• Chiral NN model and Ay puzzle
• Relativistic interactions for the meson-two-nucleon system in the clothed-particle unitary representation
• Low-energy p-d Scattering: High Precision Data, Comparisons with Theory, and Phase-Shift Analyses
• Resonant relativistic corrections and the A_y problem
• Few Body Reserch - Summary