We present new Sigma beam asymmetry data for eta meson photoproduction on the proton, using a novel tagged, laser backscattered, linearly polarized photon beam up to 1.1 GeV. The data show large, positive asymmetries, at all incident photon energies. In addition to the S-11(1535) and D-13(1520) resonances necessary to reproduce the cross sections, P-13(1720) and D-15(1675) "four stars" resonances contribute to the Sigma observable, but cannot reproduce the strong forward asymmetries measured at energies higher than 900 MeV.

Ajaka, J., Anghinolfi, M., Bellini, V., Berrier, G., Bocquet, J., Breuer, M., et al. (1998). New Measurement of Σ Beam Asymmetry for η Meson Photoproduction on the Proton. PHYSICAL REVIEW LETTERS, 81, 1797-1800 [10.1103/PhysRevLett.81.1797].

New Measurement of Σ Beam Asymmetry for η Meson Photoproduction on the Proton

D'ANGELO, ANNALISA;LAPIK, ALEXANDER;SCHAERF, CARLO;
1998-01-01

Abstract

We present new Sigma beam asymmetry data for eta meson photoproduction on the proton, using a novel tagged, laser backscattered, linearly polarized photon beam up to 1.1 GeV. The data show large, positive asymmetries, at all incident photon energies. In addition to the S-11(1535) and D-13(1520) resonances necessary to reproduce the cross sections, P-13(1720) and D-15(1675) "four stars" resonances contribute to the Sigma observable, but cannot reproduce the strong forward asymmetries measured at energies higher than 900 MeV.
1998
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
NEAR-THRESHOLD PHOTOPRODUCTION; SPIN OBSERVABLES; CALORIMETER; REGION; MODEL
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.81.1797
Ajaka, J., Anghinolfi, M., Bellini, V., Berrier, G., Bocquet, J., Breuer, M., et al. (1998). New Measurement of Σ Beam Asymmetry for η Meson Photoproduction on the Proton. PHYSICAL REVIEW LETTERS, 81, 1797-1800 [10.1103/PhysRevLett.81.1797].
Ajaka, J; Anghinolfi, M; Bellini, V; Berrier, G; Bocquet, J; Breuer, M; Calvat, P; Capogni, M; Casano, L; Castoldi, M; Ciciani, L; Corvisiero, P; D'Angelo, A; Didelez, J; Di Salvo, R; Djalali, C; Duval, M; Frascaria, R; Gervino, G; Ghio, F; Girard, P; Girolami, B; Guinault, E; Hoffmann Rothe, P; Hourany, E; Kilvington, I; Kouznetsov, V; Lapik, A; Sandri, P; Null, M; Null, D; Morlet, M; Nedorezov, V; Nicoletti, L; Perrin, C; Rebreyend, D; Renard, F; Ripani, M; Rosier, L; Rossi, P; Roudot, F; Russew, T; Sanzone, M; Schaerf, C; Sperduto, M; Sudov, A; Taiuti, M; Turinge, A; Van, W; Zucchiatti, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/96548
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