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Perturbative QCD in exclusive processes

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dc.contributor.authorZhang, Huayien
dc.contributor.committeechairRoper, L. Daviden
dc.contributor.committeememberChang, Lay Namen
dc.contributor.committeememberArndt, Richard A.en
dc.contributor.committeememberTze, Hsiung Chiaen
dc.contributor.committeememberMizutani, Tetsuroen
dc.contributor.departmentPhysicsen
dc.date.accessioned2014-08-13T14:38:45Zen
dc.date.available2014-08-13T14:38:45Zen
dc.date.issued1987en
dc.description.abstractA computer program that symbolically generates and evaluates all Feynman diagrams required for scattering amplitude for exclusive processes is tested, corrected, extended, and brought to operational status. The sensitivity of perturbative QCD predictions for the nucleon form factors, ψ → pp̅, and 𝛾𝛾 → pp̅, to the theoretical uncertainties of the nucleon wave function and the form of the running coupling constant is investigated. A new prediction for the cross-section for 𝛾𝛾 → Δ++ Δ̅++ with sum-rule wave functions is presented. As a product of the development of the computer program, the quark amplitudes for meson-baryon scattering are obtained. Integrations of the quark amplitudes over wave functions are carried out by cutting off singularities. The numerical reliability of the integration and its sensitivity to the cut-off’s and the choice of wave function are investigated.en
dc.description.adminincomplete_metadataen
dc.description.degreePh. D.en
dc.format.extentviii, 131 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/49909en
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 17685725en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1987.Z525en
dc.subject.lcshPartonsen
dc.subject.lcshFeynman diagramsen
dc.titlePerturbative QCD in exclusive processesen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplinePhysicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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