Applications of a semirelativistic quark model to photoproduction interactions
A semirelativistic quark model which is an extension of the nonrelativistic Isgur-Karl model, but allows for q{bar q} production and annihilation in the electromagnetic coupling by a semirelativistic reduction of the Dirac Hamiltonian is used to study the interactions {gamma}+p{r_arrow}K{sup +}+{Lambda}{sup 0}, K{sup +}+{Sigma}{sup 0}, K{sup 0}+{Sigma}{sup +}. In this model, the quarks are taken as nonrelativistic spin {1/2} particles. The Hamiltonian is hermitian and gauge invariant. The authors use no adjustable constants. All calculations are done in the center of momentum of the {gamma}p system. The differential cross sections and polarizations are calculated for different incident photon energies (just above threshold) and outgoing kaon angles and compared with available experimental data and results of phenomenological models. The role of the various resonances is discussed.
- DOE Contract Number:
- FG02-87ER40370
- OSTI ID:
- 243531
- Report Number(s):
- CONF-9304297--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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