Beam asymmetry and differential cross-section for the reaction gamma p -> eta p were measured from production threshold to 1500MeV photon laboratory energy. The two dominant neutral decay modes of the eta-meson, eta -> 2 gamma and eta -> 3 pi(0) , were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.

Bartalini, O., Bellini, V., Bocquet, J., Calvat, P., Capogni, M., Casano, L., et al. (2007). Measurement of eta photoproduction on the proton from threshold to 1500 MeV. THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI, 33, 169-184 [10.1140/epja/i2007-10439-9].

Measurement of eta photoproduction on the proton from threshold to 1500 MeV

BARTALINI, ORIETTA;D'ANGELO, ANNALISA;FANTINI, ALESSIA;FRANCO, DOMENICO;SCHAERF, CARLO;
2007-01-01

Abstract

Beam asymmetry and differential cross-section for the reaction gamma p -> eta p were measured from production threshold to 1500MeV photon laboratory energy. The two dominant neutral decay modes of the eta-meson, eta -> 2 gamma and eta -> 3 pi(0) , were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.
2007
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
differential cross-section; baryon resonances; photon energies; sigma(0); lambda; photoexcitation; asymmetry; mesons; graal; model
Bartalini, O., Bellini, V., Bocquet, J., Calvat, P., Capogni, M., Casano, L., et al. (2007). Measurement of eta photoproduction on the proton from threshold to 1500 MeV. THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI, 33, 169-184 [10.1140/epja/i2007-10439-9].
Bartalini, O; Bellini, V; Bocquet, J; Calvat, P; Capogni, M; Casano, L; Castoldi, M; D'Angelo, A; Didelez, J; Di Salvo, R; Fantini, A; Franco, D; Gaulard, C; Gervino, G; Ghio, F; Giardina, G; Girolami, B; Giusa, A; Guidal, M; Hourany, E; Kunne, R; Lapik, A; Sandri, P; Lleres, A; Mammoliti, F; Mandaglio, G; Moricciani, D; Mushkarenkov, A; Nedorezov, V; Nicoletti, L; Perrin, C; Randieri, C; Rebreyend, D; Renard, F; Rudnev, N; Russew, T; Russo, G; Schaerf, C; Sperduto, M; Sutera, M; Turinge, A; Vegna, V
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/96504
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