The study of baryon resonances offers a deeper understanding of the strong interaction, since the dynamics and relevant degrees of freedom hidden within them are reflected by the properties of the excited states of baryons. Higher-lying excited states at and above 1.7 GeV/c2 are generally predicted to have strong couplings to the reaction γp → pπ⁺π⁻ via πΔ or ρN intermediate states. Double-ion photo-production is, therefore, important for investigating properties of high-mass resonances. The excited states of the nucleon are usually found as broadly overlapping resonances, which may decay into a multitude of final states involving measons and baryons. Polarization observables make it possible to isolate single resonances from these other interference terms. The CLAS g9a (FROST) experiment, as part of the N⋆ spectroscopy program at the Jefferson Laboratory, has accumulated photoproduction data using circularly-polarized photons incident on a longitudinally-polarized butanol target in the photon energy range 0.3 to 2.4 GeV. This document summarizes how the beam-helicity asymmetry I⊙, the target asymmetry P[subscript]z, and the helicity difference P[subscript ⊙z] for the reaction γ[over rightarrow]p[over rightarrow] → pπ⁺π⁻ are extract from the g9a dataset. / A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy. / Summer Semester, 2013. / July 1, 2013. / baryons, mesons, photoproduction, spectroscopy / Includes bibliographical references. / Volker Crede, Professor Directing Thesis; Tomasz Plewa, University Representative; Paul Eugenio, Committee Member; Simon Capstick, Committee Member; Todd Adams, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_185076 |
| Contributors | Park, Sungkyun (authoraut), Crede, Volker (professor directing thesis), Plewa, Tomasz (university representative), Eugenio, Paul (committee member), Capstick, Simon (committee member), Adams, Todd (committee member), Department of Physics (degree granting department), Florida State University (degree granting institution) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource, computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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