Baryon physics from mesons in the realistic chiral soliton model
The prime objective of this thesis is to investigate, for the first time, baryon physics, in the leading order of 1/N{sub c} expansion (N{sub c} being the number of colors), from the {pi}{rho}{omega}{alpha}{sub 1} chiral soliton model, consistent with the low-energy features of quantum chromodynamics (QCD) and the known meson properties, as collected in the newest data base of the 1992 Particle Data Group (PDG). The {pi}{rho}{omega}a{sub 1}f{sub 1} meson effective action, used in this work, is based on the hidden gauge symmetry formalism, and has the most general form in the anomalous sector, with fourteen independent terms. After fixing three or four parameters of these, using meson properties according to the 1992 PDG, the nucleon and the Delta(1232) resonance are examined as topological solitons in this effective action, varying all free parameters to give optimal baryon properties. The diagonal and off-diagonal electroweak and strong properties of nucleons are calculated in the {pi}{rho}{omega}a{sub 1} Skyrme model; these include the nucleon electroweak form factors, diagonal and transitional form factors for nucleon and the Delta resonance, of interest to experiments at emerging continuous wave electron accelerator like CEBAF. Baryon physics is found to be very sensitive to the treatment of the {phi} meson nonstrange strong decay data; the recent method, proposed by Jain et al., is found to lead to rather unsatisfactory results, if this formalism is fit with the data from the 1992 PDG. There is a strong correlation found between the soliton mass and the axial vector coupling of nucleons, g{sub A}, as in the {pi}{rho}{omega} chiral soliton model: Reasonable g{sub A} values give too large soliton mass and vice versa; varying the free parameters of the approach cannot eliminate this problem. Finally, if the {phi} meson nonstrange strong decay data is ignored, there emerges a reasonable description for most baryon physics properties.
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, NY (United States)
- OSTI ID:
- 121157
- Resource Relation:
- Other Information: TH: Thesis (Ph.D.); PBD: 1993
- Country of Publication:
- United States
- Language:
- English
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