Electromagnetic production of mesons and hyperons from nuclei
Date
2007-12
Authors
Nsio Nzundu, Tony
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : University of Stellenbosch
Abstract
A relativistic plane wave model is developed for electromagnetic production of unbound
hyperons with free kaons from nuclei. The differential cross section is expressed as a
contraction of leptonic and hadronic tensors. The leptonic tensor is constructed by using
the helicity representation of a free Dirac spinor. A model for the corresponding elementary
process is used to calculate the hadronic tensor, in which the hadronic current operator
Jˆμ is written as a linear combination of six invariant amplitudes and six Lorentz and
gauge invariant quantities. The kinematics for this process is assumed to be a quasi-free
process i.e., the electron interacts with only one bound nucleon inside the nucleus. The
bound state wavefunction of the bound nucleon is calculated within the framework of the
relativistic mean-field approximation. The unpolarized differential cross section for the K+
electroproduction process, e + A −→ e + K+ + A + Aresidual is calculated as a function of
the hyperon scattering angle.
Description
Thesis (MSc (Physics))--University of Stellenbosch, 2007.
Keywords
Nucleon, Kaons, Orbitals, Mesons, Hyperons, Electrons -- Scattering, Electromagnetic interactions, Particles (Nuclear physics), Hadron-nuclei interactions, Dissertations -- Physics, Theses -- Physics