Recent N∗ Results from Photoproduction Experiments at CLAS

Abstract

The recent breakthroughs in the technology of polarised targets have enabled a new generation of meson photo‐production experiments to be carried out. A measurement of a full set of polarisation observables off both polarised proton and neutron targets and in a large number of meson‐production channels has come within sight. Such a measurement would very significantly reduce model‐dependence in the analysis of the data and thus has the potential to resolve long‐standing issues, such as the “missing resonance” problem, and shed new light on the nucleon excitation spectrum. This has formed the motivation for the recent N* experimental programme of CLAS