Spin Density Matrix Elements in Exclusive $\omega$ Meson Muoproduction ${}^{\ast }$

M. G. Alexeev, G. D. Alexeev, A. Amoroso +197

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\omega$ meson muoproduction on the proton at COMPASS using 160 GeV/$c$ polarised ${\mu }^{+}$ and $ μ^{…