Date Thesis Awarded


Access Type

Honors Thesis -- Access Restricted On-Campus Only

Degree Name

Bachelors of Science (BS)




Justin Stevens

Committee Members

Mainak Patel

Todd Averett


The Gluonic Excitations Experiment (GlueX) is an ongoing experiment at Thomas Jefferson National Accelerator Facility (JLab) that studies the unique properties of mesons produced in photoproduction reactions. Using previously collected data from GlueX, this project aims to explore the production of $\phi\eta^\prime$ mesons. This research analyzes the photoproduction of the $K^{+}K^{-}\eta\pi^{+}\pi^{-}$ final state, where $\phi\rightarrow$$K^{+}K^{-}$ and $\eta^\prime\rightarrow\eta\pi^{+}\pi^{-}$ meson decays are observed in search of structure in this final state. The recent observations of structure in the $\phi\eta^\prime$ final state published by the BESIII collaboration serve as a basis for comparison. The method of sideband subtraction statistically subtracts the non-$\phi$ meson contributions in order to identify the $\phi\rightarrow$$K^{+}K^{-}$ decays. Then, to identify the $\eta^\prime\rightarrow\eta\pi^{+}\pi^{-}$ decays, electromagnetic calorimeters are used to measure the photons from the $\eta\rightarrow\gamma\gamma$ decay. New analysis software that is required to study this high multiplicity final state was developed by making use of the analysis tools available in ROOT, C++, and Python. This determined the yield and mass dependence of the $\phi\eta^\prime$ final state at GlueX. Finally, this research studied the beam energy distributions, $\phi\eta^\prime$ mass distributions, and Mandelstam t of the $\phi\eta^\prime$ events for three data sets from the GlueX experiment.

On-Campus Access Only