Complete photo-production experiments

D'Angelo, A.; Ardashev, K.; Bade, C.; Bartalini, O.; Bellini, V.; Blecher, M.; Bocquet, J. P.; Capogni, M.; Caracappa, A.; Casano, L. E.; Castoldi, M.; Di Salvo, R.; Fantini, A.; Franco, D.; Gervino, G.; Ghio, F.; Giardina, Giorgio 42; Gibson, C.; Girolami, B.; Giusa, A.; Glükler, H.; Hicks, K.; Hoblit, S. c.; Honig, A.; Kageya, T. t.; Khandaker, M.; Kistner, O. C.; Kizilgul, S.; Kucuker, S.; Lapik, A.; Lehmann, A.; Sandri, P. L.; Lleres, A.; Lowry, M.; Lucas, M.; Mahon, J.; Mammoliti, F.; Mandaglio, Giuseppe; Manganaro, Marina; Miceli, L.; Moricciani, D.; Mushkarenkov, A.; Nedorezov, V.; Norum, B.; Papb, M.; Preedom, B.; Seyfarth, H.; Randieri, C.; Rebreyend, D.; Rudnev, N.; Russo, G.; Sandorfi, A.; Schaerf, C.; Sperduto, M. L.; Stroher, H.; Sutera, M. C.; Thorn, C. E.; Turinge, A.; Vegna, V.; Whisnanth, C. S.; Wang, K.; Wei, X.

doi:10.1063/1.3647092

The extraction of resonance parameters from meson photo-reaction data is a challenging effort, that would greatly benefit from the availability of several polarization observables, measured for each reaction channel on both proton and neutron targets. In the aim of obtaining such complete experiments, polarized photon beams and targets have been developed at facilities, worldwide. We report on the latest results from the LEGS and GRAAL collaborations, providing single and double polarization measurements on pseudo-scalar meson photo-production from the nucleon. © 2011 American Institute of Physics.