Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory

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dc.contributor.advisorDominguez, Cesareo Aen_ZA
dc.contributor.advisorSchilcher, Karlen_ZA
dc.contributor.authorLushozi, Mawandeen_ZA
dc.date.accessioned2017-09-23T06:39:54Z
dc.date.available2017-09-23T06:39:54Z
dc.date.issued2017en_ZA
dc.description.abstractThe Kroll-Lee-Zumino theory, an Abelian renormalizable quantum field theory of charged pions and a neutral ρ meson, provides a framework to compute corrections to the tree-level Vector-Meson-Dominance model. Despite a large ρππ coupling (gρππ ≈ 5), the loop suppresion factor of 1=(4π)² helps give reasonably small NLO (one-loop) corrections. When it comes to describing hadronic physics, one might say, these one-loop results achieve moderate to excellent success. Where the one-loop results show less than impressive agreement with experiment, it seems plausible that the NNLO (two-loop) corrections would remedy the situation. In this thesis the two-loop contribution to the ρ⁰ meson is calculated. It turns out to be larger than the one-loop result and so one must conclude that perturbation theory breaks down at this level.en_ZA
dc.identifier.apacitationLushozi, M. (2017). <i>Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/25361en_ZA
dc.identifier.chicagocitationLushozi, Mawande. <i>"Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 2017. http://hdl.handle.net/11427/25361en_ZA
dc.identifier.citationLushozi, M. 2017. Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Lushozi, Mawande AB - The Kroll-Lee-Zumino theory, an Abelian renormalizable quantum field theory of charged pions and a neutral ρ meson, provides a framework to compute corrections to the tree-level Vector-Meson-Dominance model. Despite a large ρππ coupling (gρππ ≈ 5), the loop suppresion factor of 1=(4π)² helps give reasonably small NLO (one-loop) corrections. When it comes to describing hadronic physics, one might say, these one-loop results achieve moderate to excellent success. Where the one-loop results show less than impressive agreement with experiment, it seems plausible that the NNLO (two-loop) corrections would remedy the situation. In this thesis the two-loop contribution to the ρ⁰ meson is calculated. It turns out to be larger than the one-loop result and so one must conclude that perturbation theory breaks down at this level. DA - 2017 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2017 T1 - Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory TI - Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory UR - http://hdl.handle.net/11427/25361 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/25361
dc.identifier.vancouvercitationLushozi M. Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 2017 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/25361en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhysicsen_ZA
dc.subject.otherTheoretical Physicsen_ZA
dc.titleRho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theoryen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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