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Di Salvo, R.; Fantini, A.; Mandaglio, G.; Mammoliti, F.; Bartalini, O.; Bellini, V.; Bocquet, J. P.; Casano, L.; D’angelo, A.; Didelez, J. P.; Franco, D.; Gervino, G.; Ghio, F.; Giardina, G.; Girolami, B.; Giusa, A.; Guidal, M.; Hourany, E.; Kunne, R.; Lapik, A.; Levi Sandri, P.; Lleres, A.; Manganaro, M.; Moricciani, D.; Mushkarenkov, A. N.; Nedorezov, V.; Randieri, C.; Rebreyend, D.; Rudnev, N.; Russo, G.; Schaerf, C.; Sperduto, M. L.; Sutera, M. C.; Turinge, A.; Vegna, V.; Fix, A.; Kamalov, S. S.; Tiator, L.
The European physical journal. A, Hadrons and nuclei, 11/2009, Letnik: 42, Številka: 2Journal Article
The $ \Sigma$ beam asymmetry in the photoproduction of neutral pions from quasi-free nucleons in a deuteron target was measured for the first time between 0.60 and 1.50GeV, with the GRAAL polarized and tagged photon beam. The asymmetry values from the quasi-free proton were found equal to the ones extracted from a pure proton target. The asymmetries from quasi-free proton and quasi-free neutron were found equal up to 0.82GeV and substantially different at higher energies. The results are compared with recent partial-wave analyses.
