Pseudoscalar meson photoproduction: from known to undiscovered resonances

Abstract

The role of dynamics in spin observables for pseudoscalar meson photoproduction is investigated using a density matrix approach in a multipole truncated framework. Extraction of novel rules for $\gamma p\to {\pi }^{+}n,K^{+}\Lambda$ and $\eta p$ reactions based on resonance dominance, and on other broad and reasonable dynamical assumptions, are discussed. Observables that are particularly sensitive to missing nucleonic resonances predicted by quark-based approaches, are singled out.

Comments: 22 pages, latex, 3 figures