Kaon photoproduction from nuclei in a relativistic nuclear model

Journal Article · Wed Mar 01 00:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.927· OSTI ID:6394017

Bennhold, C; Wright, L E

The formation of hypernuclei through the photoproduction of kaons is formulated in the framework of a relativistic distorted wave impulse approximation. The basic production operator is based on diagrammatic techniques and includes low-lying baryon and meson resonances. Relativistic single-particle wave functions obtained by solving the Dirac equation with scalar and timelike vector potentials are employed to describe the nucleon and hyperon bound states. The nuclear and hypernuclear structure is described in a pure single-particle single-hole model. Evaluating the matrix elements in momentum space allows straightforward treatment of Fermi motion and naturally includes nonlocalities arising from the production operator. Different nonrelativistic limits involving the upper and lower component of the Dirac wave function and a p/M expansion of the operator are investigated. The final-state interaction of the weakly absorbed kaon is incorporated via an optical potential. A variety of angular distributions for p-shell nuclei is presented and the sensitivity of the hypernuclear cross sections to the elementary operator is shown to be important. Relativistic effects are found to be important along with effects of nonlocalities for low-spin states while high-spin states with large cross sections are less affected. Kaon distortion for p-shell nuclei only provides a slight reduction in cross section for most transitions.

• Research Organization: Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701
• OSTI ID: 6394017
• Journal Information: Phys. Rev. C; (United States), Vol. 39:3
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HYPERNUCLEI
ISOTOPE PRODUCTION
KAONS PLUS
PHOTOPRODUCTION
ANGULAR DISTRIBUTION
BOUND STATE
CROSS SECTIONS
DIRAC EQUATION
DISTORTED WAVE THEORY
GEV RANGE 01-10
HIGH SPIN STATES
IMPULSE APPROXIMATION
LAMBDA PARTICLES
MATRIX ELEMENTS
NUCLEAR MODELS
OPTICAL MODELS
PARTICLE-HOLE MODEL
RELATIVITY THEORY
SHELL MODELS
SINGLE-PARTICLE MODEL
WAVE FUNCTIONS
BARYONS
BASIC INTERACTIONS
BOSONS
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
GENERAL RELATIVITY THEORY
GEV RANGE
HADRONS
HYPERONS
INTERACTIONS
KAONS
LAMBDA BARYONS
MATHEMATICAL MODELS
MESONS
NUCLEAR FRAGMENTS
NUCLEI
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES
WAVE EQUATIONS
653003* - Nuclear Theory- Nuclear Reactions & Scattering