  In two meson photoproduction off a nucleon, for the case in which two of the
three final state hadrons are products of the decay of an intermediate
resonance, general expressions for its decay distribution and for polarization
observables are derived in a model independent way. These are functions of
either the spin density matrix elements (SDME's) or statistical tensors of the
resonance, and the angles of its decay products. The expressions are general
enough that it also describes cases where more than one resonance of arbitrary
quantum numbers contributes, including interference effects. They can therefore
be used to extract the SDME's or statistical tensors of the resonances that
contribute to the reaction.
