Three-nucleon force and the Δ mechanism for pion production and pion absorption | Zendy

M. T. Peña | Zendy; P. U. Sauer | Zendy; Alfred Stadler | Zendy; Gerd Kortemeyer | Zendy

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Three-nucleon force and the Δ mechanism for pion production and pion absorption

Author(s) -

M. T. Peña,

P. U. Sauer,

Alfred Stadler,

Gerd Kortemeyer

Publication year - 1993

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.48.2208

Subject(s) - physics , pion , nucleon , degrees of freedom (physics and chemistry) , hamiltonian (control theory) , bound state , faddeev equations , quantum electrodynamics , few body systems , wave function , isobar , nuclear physics , particle physics , quantum mechanics , mathematical optimization , mathematics

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. TheFaddeev equations for the trinucleon bound state are solved with a force modelthat has already been tested in the two-nucleon system above pion-productionthreshold. The binding energy and other bound state properties are calculated.The contribution to the effective three-nucleon force arising from the pionicdegrees of freedom is evaluated. The validity of previous coupled-channelcalculations with explicit but stable $\Delta$ isobar components in thewavefunction is studied.Comment: 23 pages in Revtex 3.0, 9 figures (not included, available as postscript files upon request), CEBAF-TH-93-0

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