Date of Award
Spring 2021
Document Type
Open Access Dissertation
Department
Physics and Astronomy
First Advisor
Ralf Gothe
Abstract
Measurements of nucleon electroexcitation resonance cross-sections give unique insight into the dynamics of the strong interaction and our knowledge of Quantum Chromodynamics (QCD). The analysis of exclusive electroproduction data is an important tool in understanding the structure of the nucleon and its excited states. Exclusive channels give a clear way to extract the desired resonant contributions from non-resonant contributions. A gap in the helicity amplitudes extracted from single-pion cross-section data exists for virtual photon momentum transfers ($Q^2$) in the range of $1-2~\mathrm{GeV}^{2}$. Using data collected by the CEBAF Large Acceptance Spectrometer (CLAS) detector with a beam energy of $4.8~\mathrm{GeV}$, the reaction channel $\gamma^{*}p \rightarrow n\pi^{+}$ is used in this study to investigate the kinematic region covering $W=[1.1,1.82)~\mathrm{GeV}~\mathrm{and}~Q^2=[1.1,3.5)~\mathrm{GeV}^2$. This work expands on the previous kinematic coverage for charged single-pion electroproduction and increases the angular coverage of previously extracted kinematic bins.
Rights
© 2021, Nicholas Scoville Tyler
Recommended Citation
Tyler, N. S.(2021). Measurement of N* Cross-Sections from Single-Pion Electroproduction at Low Q^2. (Doctoral dissertation). Retrieved from https://scholarcommons.sc.edu/etd/6302