The graal experiment: Beam polarization asymmetries in pseudoscalar meson photoproduction

• DOI: 10.1007/s10582-999-0084-6
• Publication Date: 2007-03-21T09:59:05Z
• Authors: Rachele Di Salvo; J. Ajaka; M. Anghinolfi; O. Bartalini; V. Bellini; G. Berrier; J. P. Bocquet; M. Breuer; P. Calvat; M. Capogni; L. Casano; M. Castoldi; L. Ciciani; P. Corvisiero; A. D'Angelo; J. P. Didelez; Ch. Djalali; M. A. Duval; R. Frascaria; C. Gaulard; G. Gervino; F. Ghio; P. Girard; B. Girolami; M. Guidal; E. Guinault; E. Hourany; V. Kuznetsov; A. Lapik; P. Levi Sandri; A. Lleres; D. Moricciani; M. Morlet; V. Nedorezov; L. Nicoletti; C. Perrin; D. Rebreyend; F. Renard; M. Ripani; L. Rosier; P. Rossi; N. Rudnev; M. Sanzone; C. Schaerf; M. L. Sperduto; A. Sudov; M. Taiuti; A. Turinge; J. Van de Wiele; A. Zucchiatti
• Keywords: 0103 physical sciences; PION-PHOTOPRODUCTION; ETA-PHOTOPRODUCTION; MONITORING-SYSTEM; SPIN OBSERVABLES; BGO CALORIMETER; RESONANCES; THRESHOLD; PROTON; NUCLEI; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; 01 natural sciences; 7. Clean energy

The GRAAL tagged and polarized γ beam has been operating with a maximum energy of 1100 MeV. For the first time asymmetry results in ν photoproduction were obtained and will be shown. Interesting results have also been obtained for π0 and π+ photo-production, that largely confirm the already existing ones, but also extend in not yet explored angular and energetic regions, especially for backward scattering and energies greater than 900 MeV.