[Halld-physics] MENU 2019 Abstract

[wmcginle at jlab.org]

Hello All,

I would like to submit an abstract for the MENU 2019 conference. If you
have any comments please send them to me.

Thanks,
Will McGinley

Title: Exclusive eta photoproduction and Sigma beam asymmetries at GlueX

Abstract:
GlueX is capable of making Sigma beam asymmetry measurements using
a tagged, linearly-polarized 9 GeV photon beam incident on a hydrogen
target. Measurements of the Sigma beam asymmetry for the exclusive
reaction, gamma p -> eta p , will provide insight into the meson
production mechanism. GlueX measurements are the first beam asymmetry
results for the eta in this energy range and are expected to further
constrain Regge theory models for photoproduced pseudoscalar mesons. This
talk will present preliminary results of the photon Sigma beam asymmetry
as a function of the Mandelstam variable, t , for multiple eta decay
modes.