Exclusive Eta and Eta’ Photoproduction and Beam Asymmetries at GlueX

ORAL

Abstract

The GlueX experiment is a photoproduction experiment located at Thomas Jefferson National Accelerator Facility (TJNAF) in Newport News, Virginia. GlueX is capable of making beam asymmetry ($\Sigma$) measurements using a tagged, linearly-polarized 9 GeV photon beam incident on a hydrogen target. Measurements of the beam asymmetry for the exclusive reactions, $\gamma p\rightarrow\eta p$ and $\gamma p\rightarrow\eta'p$, will provide insight into the meson production mechanisms. GlueX measurements are the first beam asymmetry results for the $\eta$ and $\eta^{\prime}$ in this energy range and are expected to further constrain Regge theory models for photoproduced pseudoscalar mesons. This talk will present results of the photon beam asymmetries as a function of the Mandelstam variable, t , for multiple $\eta$ decay modes and the $\eta'\rightarrow\pi^+\pi^-\eta$ decay mode.

*NSERC grant SAPPJ-2018-00021, DOE Grant No. DE-FG0287ER40315

Authors

  • Will McGinley

    • Carnegie Mellon University
  • Tegan Beattie

    • University of Regina
  • Zisis Papandreou

    • University of Regina
  • Curtis Meyer

    • Carnegie Mellon University
  • Justin Stevens

    • College of William \& Mary
  • Dave Mack

    • Jefferson Lab