E. Hourany

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The photoproduction of the omega meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at(More)
Institute for Nuclear Research, 117312 Moscow, Russia INFN sezione di Roma II and Università di Roma ”Tor Vergata”, 00133 Roma, Italy INFN Laboratori Nazionali del Sud and Università di Catania, 95123 Catania,Italy INFN Genova and Università di Genova, 16146 Genova, Italy IN2P3, Institut de Physique Nucléaire, 91406 Orsay, France INFN sezione di Torino and(More)
The double pi(0) photoproduction off the proton has been measured in the beam energy range of 0.65-1.5 GeV. The total and differential cross sections and the Sigma 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(More)
s. Nucleon spectroscopy studies the nucleon and its resonances. In photoproduction of mesons below a beam energy of 2 GeV, the main process is the excitation of nucleon resonances. This can be used to complement the study of these resonances, usually carried out with pion-nucleon scattering. A basic presentation of the lightest mesons and the resonances is(More)
J. Ajaka, Y. Assafiri, S. Bouchigny, J. P. Didelez, L. Fichen, M. Guidal, E. Hourany,* V. Kouznetsov, R. Kunne, A. N. Mushkarenkov, V. Nedorezov, N. Rudnev, A. Turinge, and Q. Zhao IN2P3, Institut de Physique Nucléaire, 91406 Orsay, France Institute for Nuclear Research, 60th October Anniversary Prospect 7a, 117 312 Moscow, Russia I. Kurchatov Institute of(More)
The analysis of the gammap-->etapi(0)p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The(More)
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