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The quark-hadron transition and hot hadronic matter in the early universe
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Physics
2015
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| _version_ | 1867613315270705152 |
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| access_status_str | Open Access |
| author | Von Oertzen, Detlof Wilhelm |
| author2 | Rafelski, Johann |
| author_browse | Rafelski, Johann Von Oertzen, Detlof Wilhelm |
| author_facet | Rafelski, Johann Von Oertzen, Detlof Wilhelm |
| author_sort | Von Oertzen, Detlof Wilhelm |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/15904 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:10.861Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| 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:11427/15904 The quark-hadron transition and hot hadronic matter in the early universe Von Oertzen, Detlof Wilhelm Rafelski, Johann Cleymans, Jean Quarks Hadrons Nuclear astrophysics Theoretical Physics Includes bibliographical references. Various calculations· of the evolution of the hadron gas in the early universe are carried out. To determine the starting point for the evolution equations a phase transition between the quark-gluon plasma phase and the hadron gas phase is constructed. A simple calculation leads to an estimate of the chemical potential of baryons at the quark-hadron phase transition in the early universe. We investigate how the transition temperature depends on the equations of state for the bagged quark and the hadron phase. A particle density evolution model is introduced which predicts the temperature at which particle species drop out of equilibrium (freeze-out) in an expanding universe. We then construct dynamical evolution equations to describe the reactions of interacting pions and photons. In order to model a more realistic hadron gas, we include kaons and finally nucleons and hyperons into the model universe. The results indicate that this type of model should be extended to include more interacting particle species and that a more realistic evolution model is dependent on obtaining accurate reaction cross-sections. 2015-12-20T15:43:50Z 2015-12-20T15:43:50Z 1987 Master Thesis Masters MSc http://hdl.handle.net/11427/15904 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Quarks Hadrons Nuclear astrophysics Theoretical Physics Von Oertzen, Detlof Wilhelm The quark-hadron transition and hot hadronic matter in the early universe |
| thesis_degree_str | Master's |
| title | The quark-hadron transition and hot hadronic matter in the early universe |
| title_full | The quark-hadron transition and hot hadronic matter in the early universe |
| title_fullStr | The quark-hadron transition and hot hadronic matter in the early universe |
| title_full_unstemmed | The quark-hadron transition and hot hadronic matter in the early universe |
| title_short | The quark-hadron transition and hot hadronic matter in the early universe |
| title_sort | quark hadron transition and hot hadronic matter in the early universe |
| topic | Quarks Hadrons Nuclear astrophysics Theoretical Physics |
| url | http://hdl.handle.net/11427/15904 |
| work_keys_str_mv | AT vonoertzendetlofwilhelm thequarkhadrontransitionandhothadronicmatterintheearlyuniverse AT vonoertzendetlofwilhelm quarkhadrontransitionandhothadronicmatterintheearlyuniverse |