Dirac wave functions in hypernuclear formation through kaon photoproduction

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5014800

Bennhold, C

The formation of hypernuclei through the photoproduction of kaons is formulated in the framework of a Relativistic Distorted Wave Impulse Approximation (RDWIA). Single particle wave functions obtained by solving the Dirac equation with scalar and vector potentials are employed to describe the nucleon and hyperon bound states. Evaluating the matrix elements in momentum space allows straightforward treatment of Fermi motion and nonlocalities of the photoproduction amplitude. The coupling constants of this operator, which is derived using diagrammatic techniques ad includes low-lying baryon and meson resonances, are obtained by a least squares fit to data. Kaon distortion is treated via an optical potential that is derived from the elementary KN-amplitudes. Relativistic effects are found to be important along with the effects of the nonlocalities, whereas kaon distortion is of minor importance. Realistic predictions about the effects of the hadron resonances are complicated by the uncertainty regarding the elementary coupling constants. Extensions of the impulse approximation were discussed in form of off-shell effects and medium modifications.

• Research Organization: Ohio Univ., Athens, OH (USA)
• OSTI ID: 5014800
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
653000* -- Nuclear Theory
653001 -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
DATA
FUNCTIONS
HADRON REACTIONS
HYPERNUCLEI
INFORMATION
KAON REACTIONS
MATHEMATICAL MODELS
MESON REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PRODUCTION
THEORETICAL DATA
WAVE FUNCTIONS