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Title:Vector meson dominance and pion photoproduction
Author(s):Potter, Wendy Nan Torrance
Doctoral Committee Chair(s):Sullivan, J.D.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):vector meson dominance
pion photoproduction
kinematic singularity
Abstract:A detailed theoretical treatment is given of the vector mesondominance approximation of a k2 dispersion relation for any of a large number of sets of invariant amplitudes for pion photoproduction. The resulting cross section always has a kinematic singularity; whether or not it is in the physical region depends on which set is used. The· standard proportionality between polarized photon and vector meson· cross sections in the center of mass is recovered at high s for some of the sets discussed. Support for vector meson pole dominance of a R2 dispersion relation at high s is found from the investigation of the analyticity of the box graph as a function of the mass-squared of one of the external particles. A question is raised concerning the renormalization of divergent diagrams containing a single vector meson virtual state in the familiar Lagrangian treatment of vector meson dominance.
Issue Date:1971
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/25870
Rights Information:1971 Wendy Nan Torrence Potter
Date Available in IDEALS:2011-07-28
Identifier in Online Catalog:5323570


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