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Physics Letters B (2007) 108-113
Double $\pi^0$ photoproduction on the neutron at GRAAL
J. Ajaka1, Y. Assafiri1, O. Bartalini, V. Bellini, S. Bouchigny1, M. Castoldi, A. D'Angelo, J.P. Didelez1, R. Di Salvo, A. Fantini, L. Fichen1, G. Gervino, F. Ghio, B. Girolami, A. Giusa, M. Guidal1, E. Hourany1, R. Kunne1, A. Lapik, P. Levi Sandri, D. Moricciani, A. Mushkarenkov, V. Nedorezov, C. Randieri, N. Rudnev, G. Russo, C. Schaerf, M. Sperduto, M. Sutera, A. Turinge

The photoproduction of double $\pi^0$ on the neutron is studied in the beam energy range of 0.6 up to 1.5 GeV, using a liquid deuterium target. The cross section and the beam asymmetry are extracted and compared to those previously obtained on a proton target. The theoretical interpretation of these results is given using different models.
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
Physique/Physique des Hautes Energies - Expérience
Double $\pi^0$ photoproduction – Neutron target – Baryon resonances – Polarization observables – Photon beam asymmetry