First measurement of hard exclusive ${\pi }^{-}{\Delta }^{++}$ electroproduction beam-spin asymmetries off the proton

S. Diehl, N. Trotta, K. Joo +142

The polarized cross section ratio ${\sigma }_{L{T}^{\prime }}/{\sigma }_0$ from hard exclusive ${\pi }^{-}{\Delta }^{++}$ electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asym…