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

O. Bartalini, V. Bellini, J.P. Bocquet, P. Calvat, M. Capogni, L. Casano, M. Castoldi, A. D'Angelo, J.-P. Didelez, R. Di Salvo, A. Fantini, D. Franco, C. Gaulard, G. Gervino, F. Ghio, G. Giardina, B. Girolami, A. Giusa, M. Guidal, E. HouranyR. Kunne, A. Lapik, P. Levi Sandri, A. Lleres, F. Mammoliti, G. Mandaglio, D. Moricciani, A.N. Mushkarenkov, V. Nedorezov, L. Nicoletti, C. Perrin, C. Randieri, D. Rebreyend, F. Renard, N. Rudnev, T. Russew, G. Russo, C. Schaerf, M.-L. Sperduto, M.-C. Sutera, A. Turinge, V. Vegna

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Abstract

Beam asymmetry and differential cross-section for the reaction γp → ηp were measured from production threshold to 1500MeV photon laboratory energy. The two dominant neutral decay modes of the η -meson, η → 2γ and η → 3π0, 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 Società Italiana di Fisica and Springer-Verlag.
Original languageEnglish
Pages (from-to)169 - 184
Number of pages16
JournalEuropean Physical Journal A
Volume33
Issue number2
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Bartalini, O., Bellini, V., Bocquet, J. P., Calvat, P., Capogni, M., Casano, L., Castoldi, M., D'Angelo, A., Didelez, J-P., Di Salvo, R., Fantini, A., Franco, D., Gaulard, C., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Guidal, M., ... Vegna, V. (2007). Measurement of η photoproduction on the proton from threshold to 1500 MeV. European Physical Journal A, 33(2), 169 - 184. https://doi.org/10.1140/epja/i2007-10439-9