Mechanism of /sup 3/He(. pi. /sup -/,pn) reaction

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.2163· OSTI ID:5644279

Lee, T H

The ..pi../sup -/ absorption by /sup 3/He is investigated in a model study based on the nucleon pole mechanism ..pi..NN..-->..NN..-->..NN. We find that the amplitude of the three-body rescattering mechanism can have a strong interference effect with the amplitude of the direct two-body absorption process even in the region where the two-body process dominates. The main experimental signature of this important coherent effect is a sharp peak near the high energy end of the proton spectrum measured in a coincident experiment. Our results suggest that in order to extract the isospin dependence of pion absorption by a pair of nucleons from the recent /sup 3/He(..pi../sup + -/,NN) data, the three-nucleon rescattering amplitude must be calculated accurately and included coherently in the analysis.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5644279
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651215* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
CAPTURE
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRONS
HELIUM 3 TARGET
ISOSPIN
MANY-BODY PROBLEM
MESON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
OPTICAL MODELS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION REACTIONS
PROTON SPECTRA
PROTONS
RESCATTERING
SCATTERING
SPECTRA
TARGETS
THREE-BODY PROBLEM
WAVE FUNCTIONS