Theory of inelastic lepton-nucleus scattering

dc.contributor.advisor James P. Vary Yen, Granddon
dc.contributor.department Physics and Astronomy 2018-08-15T15:39:27.000 2020-07-02T06:15:23Z 2020-07-02T06:15:23Z Fri Jan 01 00:00:00 UTC 1988 1988
dc.description.abstract <p>This work reports the studies of the quark structure of a nucleus. Deuterium is the simplest nuclear system with weak binding energy and low average density so that it provides an ideal starting point for this study. Models based on the one photon exchange process should provide a good description of deuterium inelastic lepton scattering data. Furthermore, the available deuterium data cover the widest kinematical range among all A ≥ 2 targets. If the conventional nuclear physics picture is correct, the quasi-elastic nucleon knockout process along with nucleon inelastic processes should be able to account for the inelastic lepton scattering data. However, there are uncertainties in the deuteron wavefunctions, nucleon elastic form factors and nucleon inelastic structure functions. To understand these uncertainties and their possible role in obscuring the quark structure of the nucleus, I examined two deuteron wavefunction models: Reid Soft Core (RSC) and Bonn; three nucleon elastic form factors: Blatnik and Zovko, Hohler, and Gari and Krumpelmann; and three nucleon inelastic structure function models: Buras and Gaemers (BG), Abbott, Atwood and Barnett (AAB), and Duke and Owens (DO). The Gari and Krumpelmann nucleon form factors combining the meson dynamics at low Q[superscript]2 and QCD quark dynamics at high Q[superscript]2 should perform better in the long run, and are turned to fit available nucleon data. On the other hand the nucleon inelastic structure functions are not free of ambiguities. While the AAB and DO seem to fit data better in the higher Q[superscript]2 region, I chose BG in my deuterium calculations because it fits the nucleon inelastic data better in the kinematic region (2.5 ≤ Q[superscript]2 ≤ 8 GeV[superscript]2) where the deuterium data are analyzed. The Bonn potential is based on a more sophisticated meson exchange theory, and is believed to more accurately describe a wider spectrum of nuclear properties. The theoretical results with the RSC wavefunction agree with data fairly well, while the Bonn wavefunction opens the door to the 6-quark cluster to play an important role. With the Bonn deuterium wavefunctions I determined that the critical radius for 6-quark cluster formation R[subscript]C ~ 0.49 fm which provides a 5% probability of a 6-q cluster configuration in the ground state of deuterium.</p>
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dc.identifier archive/
dc.identifier.articleid 10745
dc.identifier.contextkey 6366553
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/9746
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:37:07 UTC 2022
dc.subject.disciplines Nuclear
dc.subject.keywords Physics
dc.subject.keywords Nuclear physics
dc.title Theory of inelastic lepton-nucleus scattering
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930 dissertation Doctor of Philosophy
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