High-statistics study of neutral-pion pair production in two-photon collisions

Belle Collaboration, I. Adachi

The differential cross section for the process $\gamma \gamma \to {\pi }^0{\pi }^0$ has been measured in the kinematic range 0.6 GeV $<W<4.1$ GeV, $|\cos {\theta }^{\ast }|<0.8$ in energy and pion scattering angl…