Single ${\pi }^0$ photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of $\sim 98\%$ of $4\pi$. Differential cross sections $d\sigma /d\Omega$ have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the $s$ channel intermediate state $\gamma p\to N^{*}({\Delta }^{*})\to p{\pi }^0$. A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance $N(2070)D_{15}$.

• Received 14 July 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.012003