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Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory
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 re...
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| Format: | Thesis |
| Language: | English |
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Department of Physics
2017
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| _version_ | 1867613287244365824 |
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| access_status_str | Open Access |
| author | Lushozi, Mawande |
| author2 | Dominguez, Cesareo A |
| author_browse | Dominguez, Cesareo A Lushozi, Mawande |
| author_facet | Dominguez, Cesareo A Lushozi, Mawande |
| author_sort | Lushozi, Mawande |
| collection | Thesis |
| description | 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. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/25361 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:43.673Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/25361 Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory Lushozi, Mawande Dominguez, Cesareo A Schilcher, Karl Physics Theoretical Physics 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. 2017-09-23T06:39:54Z 2017-09-23T06:39:54Z 2017 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/25361 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Physics Theoretical Physics Lushozi, Mawande Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| thesis_degree_str | Doctoral |
| title | Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| title_full | Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| title_fullStr | Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| title_full_unstemmed | Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| title_short | Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory |
| title_sort | rho meson propagator at two loop order in the kroll lee zumino quantum field theory |
| topic | Physics Theoretical Physics |
| url | http://hdl.handle.net/11427/25361 |
| work_keys_str_mv | AT lushozimawande rhomesonpropagatorattwolooporderinthekrollleezuminoquantumfieldtheory |