Helicity-dependent cross sections for the photoproduction of ${\pi }^0$ pairs from nucleons

M. Dieterle, L. Witthauer, A. Fix +88

The double-polarization observable $E$ and helicity-dependent cross sections ${\sigma }_{1/2}$, ${\sigma }_{3/2}$ have been measured for the photoproduction of ${\pi }^0$ pairs off quasi-free protons a…