Three-nucleon force the {Delta}-mechanism for pion production and pion absorption

Technical Report · Tue May 18 04:00:00 EDT 1993

DOI:https://doi.org/10.2172/10184314· OSTI ID:10184314

Pena, M T ^[1]; Sauer, P U ^[2]; Stadler, A ^[2]; Kortemeyer, G ^[2]

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1. Lisbon Univ. (Portugal). Centro de Fisica Nuclear
2. Hannover Univ. (Germany). Inst. fuer Theoretische Physik

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 A isobar components in the wavefunction is studied.

• Research Organization: Southeastern Universities Research Association, Inc., Newport News, VA (United States). Continuous Electron Beam Accelerator Facility
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 10184314
• Report Number(s): DOE/ER/40150--237; CEBAF-TH--93-08; ON: DE93040870
• Country of Publication: United States
• Language: English

Related Subjects

662340
663460
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
BOUND STATE
CHARGE-EXCHANGE REACTIONS
DEGREES OF FREEDOM
FADDEEV EQUATIONS
HADRON INTERACTIONS
HAMILTONIANS
MESON- AND HYPERON-INDUCED REACTIONS AND SCATTERING
NUCLEAR FORCES
PARTICLE PRODUCTION
PION-NUCLEON INTERACTIONS
PIONS
SELF-ENERGY
THREE-BODY PROBLEM
WAVE FUNCTIONS