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.
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Authors
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Will McGinley
Carnegie Mellon University
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Tegan Beattie
University of Regina
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Zisis Papandreou
University of Regina
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Curtis Meyer
Carnegie Mellon University
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Justin Stevens
College of William \& Mary
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Dave Mack
Jefferson Lab