Three-Nucleon Force and the $Δ$-Mechanism for Pion Production and Pion Absorption

Details Three-Nucleon Force and the $Δ$-Mechanism for Pion Production and Pion Absorption Three-Nucleon Force and the $Δ$-Mechanism for Pion Production and Pion Absorption

1993-05-20

arxiv.org/abs/nucl-th/9305014v1

Phys.Rev.C48:2208-2221,1993

Physics

Nuclear Physics

Nuclear Theory

23 pages in Revtex 3.0, 9 figures (not included, available as postscript files upon request), CEBAF-TH-93-08

Scientific paper

10.1103/PhysRevC.48.2208

The description of the three-nucleon system in terms of nucleon and $\Delta$ degrees of freedom is extended to allow for explicit pion production (absorption) from single dynamic $\Delta$ de-excitation (excitation) processes. This mechanism yields an energy dependent effective three-body hamiltonean. The Faddeev equations for the trinucleon bound state are solved with a force model that has already been tested in the two-nucleon system above pion-production threshold. The binding energy and other bound state properties are calculated. The contribution to the effective three-nucleon force arising from the pionic degrees of freedom is evaluated. The validity of previous coupled-channel calculations with explicit but stable $\Delta$ isobar components in the wavefunction is studied.

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