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 K̅N scattering. Most prior energy-dependent partial-wave analyses of K̅N 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 K̅N reactions. These high quality data have also fostered part of the motivation for our new partial-wave analysis. In this dissertation, we initialized our single-energy analysis of K̅N 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. Our research included all available data for K̅N → K̅N, K̅N → π Λ, and K̅N → π Σ reactions, covering the c. m. energy range 1480 to 2170 MeV.
|Advisor:||Manley, D. Mark|
|Commitee:||Almasan, Carmen C., Cavaretta, Alfred S., Keane, Declan, Sampson, Paul, Tandy, Peter C.|
|School:||Kent State University|
|School Location:||United States -- Ohio|
|Source:||DAI-B 78/11(E), Dissertation Abstracts International|
|Keywords:||Crystal ball, K 773, Multichannel, N scattering, Partial-wave analysis|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be