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.

Ajaka, J., Assafiri, Y., Bartalini, O., Bellini, V., Bouchigny, S., Castoldi, M., et al. (2008). Simultaneous photoproduction of eta and pi(0) mesons on the proton. PHYSICAL REVIEW LETTERS, 100(5) [10.1103/PhysRevLett.100.052003].

Simultaneous photoproduction of eta and pi(0) mesons on the proton

D'ANGELO, ANNALISA;FANTINI, ALESSIA;SCHAERF, CARLO;
2008-01-01

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.
2008
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Chirality; Photochemical reactions; Protons; Resonance; Beam asymmetry; Beam energy; Mesons; Photoproduction; Bosons
Ajaka, J., Assafiri, Y., Bartalini, O., Bellini, V., Bouchigny, S., Castoldi, M., et al. (2008). Simultaneous photoproduction of eta and pi(0) mesons on the proton. PHYSICAL REVIEW LETTERS, 100(5) [10.1103/PhysRevLett.100.052003].
Ajaka, J; Assafiri, Y; Bartalini, O; Bellini, V; Bouchigny, S; Castoldi, M; D'Angelo, A; Didelez, J; 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; Sandri, P; Moricciani, D; Mushkarenkov, A; Nedorezov, V; Oset, E; Randieri, C; Rudnev, N; Russo, G; Schaerf, C; Sperduto, M; Sutera, M; Turinge, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/34799
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