Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering
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Kent State University / OhioLINK
2008
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=kent1211369275 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-kent12113692752021-08-03T05:36:32Z Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering Zhang, Hongyu Physics partial-wave analysis multichannel K&773 N scattering crystal ball <p>The main goal of this dissertation is the experimental and phenomenological study of hyperon spectroscopy. In this work, we focus on the strangeness -1 hyperon resonances, the Λ* and Σ*s. Our ultimate goal is to obtain more reliable information about the properties of Λ* and Σ* resonances by carrying out a multichannel partial-wave analysis of <i>K̅N</i> scattering. Most prior energy-dependent partial-wave analyses of <i>K̅N</i> scattering assumed a simple parametrization for the partial-wave amplitudes. Such a parametrization introduces a model-dependent bias and results in a violation of unitarity of the partial-wave S-matrix.Thus, one objective of our work is to reduce this bias as much as possible by carrying out a constrained single-energy partial-wave analysis. The Crystal Ball Collaboration recently measured several important <i>K̅N</i> reactions. These high quality data have also fostered part of the motivation for our new partial-wave analysis.</p><p>In this dissertation, we initialized our single-energy analysis of <i>K̅N</i> scattering using results of a global fit of previously published partial-wave amplitudes. Thereafter, we performed a multichannel fit of our single-energy amplitudes to determine an energy-dependent solution that is consistent with S-matrix unitarity. We iterated between single-energy and energy-dependent fits until we obtained an energy-dependent solution that agrees with the initial data.</p><p>Our research included all available data for <i>K̅N</i> → <i>K̅N</i>, <i>K̅N</i> → π Λ, and <i>K̅N</i> → π Σ reactions, covering the c. m. energy range 1480 to 2170 MeV.</p> 2008-05-30 English text Kent State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=kent1211369275 http://rave.ohiolink.edu/etdc/view?acc_num=kent1211369275 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Physics partial-wave analysis multichannel K&773 N scattering crystal ball |
| spellingShingle |
Physics partial-wave analysis multichannel K&773 N scattering crystal ball Zhang, Hongyu Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| author |
Zhang, Hongyu |
| author_facet |
Zhang, Hongyu |
| author_sort |
Zhang, Hongyu |
| title |
Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| title_short |
Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| title_full |
Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| title_fullStr |
Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| title_full_unstemmed |
Multichannel Partial-Wave Analysis of <i>K̅N</i> Scattering |
| title_sort |
multichannel partial-wave analysis of <i>k̅n</i> scattering |
| publisher |
Kent State University / OhioLINK |
| publishDate |
2008 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=kent1211369275 |
| work_keys_str_mv |
AT zhanghongyu multichannelpartialwaveanalysisofikniscattering |
| _version_ |
1719422438834438144 |