Theory of single pion production in nucleon-nucleon scattering

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dc.contributor.advisorDuck, Ian M.en_US
dc.contributor.committeeMemberBaker, Stephen D.en_US
dc.contributor.committeeMemberMutchler, Gordon S.en_US
dc.creatorUmland, Eric Alexanderen_US
dc.date.accessioned2018-12-18T21:16:29Zen_US
dc.date.available2018-12-18T21:16:29Zen_US
dc.date.issued1981en_US
dc.description.abstractWe have developed a phenomenological theory for the reaction NN+NNir based on the peripheral model and the formation and decay of dibaryon resonances. The peripheral graphs include one pion exchange with a monopole form factor at the TTNN vertex and the full TTN elastic scattering amplitude obtained from phase shift analyses and including off-shell corrections. Interfering with the one pion exchange graphs are one rho exchange graphs. Similiar monopole form factors are included at the pNN and pNA vertices. All form factors possess one adjustable parameter. We also study effects due to the still speculative J = 3~ and 2+ dibaryon resonances. The highly inelastic nature of these objects suggests that a single pion production reaction of the form NN+R+NA+NNTr presents the best opportunity for observing dibaryon manifestations. We calculated the fifth order spin dependent differential cross sections d+ (beam polarized up) and cr (beam polarized down) and the asymmetry (c+-c)/(a +). The peripheral model alone gives generally poor agreement with the kinematically-complete, beam polarized data of Hancock. Inclusion of the diproton amplitudes results in a general improvement in the fits, supporting the notion of such resonances in the 3 and 1D2 partial waves of the NN channel.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent96 ppen_US
dc.identifier.callnoThesis Phys. 1981 Umlanden_US
dc.identifier.citationUmland, Eric Alexander. "Theory of single pion production in nucleon-nucleon scattering." (1981) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104035">https://hdl.handle.net/1911/104035</a>.en_US
dc.identifier.digitalRICE1661en_US
dc.identifier.urihttps://hdl.handle.net/1911/104035en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleTheory of single pion production in nucleon-nucleon scatteringen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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