Precise measurements of the differential cross section and the beam polarization asymmetry Σ have been obtained by the GRAAL collaboration for the and the reactions, at incoming photon energies up to 1.48 GeV. Preliminary data are presented and compared with different theoretical calculations. First measurements of the Σ observable are also available for the reaction channel.
MESON PHOTOPRODUCTION AT GRAAL
BELLINI, Vincenzo;SUTERA, CONCETTA MARIA;
2001-01-01
Abstract
Precise measurements of the differential cross section and the beam polarization asymmetry Σ have been obtained by the GRAAL collaboration for the and the reactions, at incoming photon energies up to 1.48 GeV. Preliminary data are presented and compared with different theoretical calculations. First measurements of the Σ observable are also available for the reaction channel.File in questo prodotto:
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