1. Simultaneous Photoproduction of eta and pi0 Mesons on the Proton
- Author
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Ajaka, J., Assafiri, Y., Bartalini, O., Bellini, Vincenzo, Bouchigny, S., Castoldi, M., D'Angelo, A., Didelez, J. P., DI SALVO, R., Doring, M., Fantini, A., Fichen, L., Gervino, G., Ghio, F., Girolami, B., Giusa, A, Guidal, M., Hourany, E., Kunne, R., Lapik, A., LEVI SANDRI, P., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Oset, E., Randieri, C., Rudnev, N., Russo, Giuseppe, Schaerf, C., Sperduto, M., Sutera, CONCETTA MARIA, and Turinge, A.
- Subjects
interaction [photon p] ,Beam energy ,Resonance ,(1)) [< 1.5 GeV] ,Settore FIS/04 - Fisica Nucleare e Subnucleare ,energy dependence ,Grenoble ESRF [interpretation of experiments] ,Photochemical reactions ,ddc:550 ,Chirality ,Protons ,Beam asymmetry ,Mesons ,Photoproduction ,Bosons ,Nuclear Experiment ,numerical calculations ,associated production [pi0] ,photoproduction [eta] ,cross section ,N(1535) ,polarized beam [photon] ,+p+eta+pi0%22">photon p --> p eta pi0 ,intermediate boson [nucleon resonance] ,Delta(1700) ,asymmetry [polarization] ,High Energy Physics::Experiment ,chiral [effective Lagrangian] - Abstract
The analysis of the gamma p ->eta pi(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 S-11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the Delta(1700) excitation, followed by the decay into eta Delta(1232), is found to be dominant.
- Published
- 2008
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