(English) The Double π° and ω-Meson Photoproduction at Graal

The double π⁰ photoproduction off the proton has been measured in the beam energy range of 0.65 1.5GeV. The total and differential cross sections and the Σ beam asymmetry were extracted. The total cross section measured for the first time in the third resonance region of the nucleon shows a prominent peak. The interpretation of these results by two independent theoretical models infers mostly the selective excitation of P₁₁– and D₁₃-nucleon resonances.

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Y. Assafiri, O. Bartalini, V. Bellini, J. P. Bocquet, S. Bouchigny, M. Capogni, M. Castoldi, A. D’Angelo, J. P. Didelez, R. Di Salvo, A. Fantini, L. Fichen, G. Gervino, F. Ghio, B. Girolami, A. Giusa, M. Guidal, E. Hourany, V. Kouznetsov, R. Kunne, JM. Laget, A. Lapik, P. Levi Sandri, A. Lleres, D. Moricciani, V. Nedorezov, D. Rebreyend, C. Randieri, F. Renard, N. Rudnev, C. Schaerf, M. Sperduto, M. C. Sutera, A. Turinge, Q. Zhao, A. Zucchiatti (2003).

NSTAR 2002, Proceedings of the Workshop on the Physics of Excited Nucleons, Pittsburg, Pennsylvania (USA), 9-12 October 2002. World Scientific Publishing Co. Pte. Ltd., July 2003, pp. 261-266, doi: 10.1142/9789812705174 0037.

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