Probing confined-quark dynamics via nucleon form factors
Conference
·
OSTI ID:267478
The QCD Dyson-Schwinger equations [DSEs] provide the basis for a phenomenology, in which the known large-q{sup 2} behavior of the gluon propagator is extrapolated to small-q{sup 2} via a parameterisation that incorporates the qualitative features of many studies of the gluon DSE. This phenomenology has been successfully applied in the calculation of a wide range of hadron observables; for example: the meson ground state spectrum, the elastic scattering and anomalous transition form factors of pseudoscalar mesons; and the electroproduction of vector mesons. The electromagnetic form factors of the nucleon are calculated using a product Ansatz for the nucleon Fadde`ev amplitude. The preliminary results are encouraging. Isoscalar-scalar and isovector-pseudovector confined diquark correlations are found to provide the dominant contribution to the form factors. The inclusion of the isovector-pseudovector correlation can help describe the electric and magnetic properties of the nucleon.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 267478
- Report Number(s):
- ANL/PHY/CP--90228; CONF-9605180--2; ON: DE96012810
- Country of Publication:
- United States
- Language:
- English
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