First Measurement of the $\Sigma$ Beam Asymmetry in ${\eta }^{\prime }$ Photoproduction off the Proton near Threshold

P. Levi Sandri, G. Mandaglio, V. De Leo +33

The $\Sigma$ beam asymmetry in ${\eta }^{\prime }$ photoproduction off the proton was measured at the GrAAL polarised photon beam with incoming photon energies of 1.461 and 1.480 GeV. For both…