Vegna, V.; Bellini, V.; Bouquet, J. P.; Casano, L.; D'Angelo, A.; Didelez, J. P.; Di Salvo, R.; Fantini, A.; Franco, D.; Gervino, G.; Ghio, F.; Giardina, G.; Girolami, B.; Giusa, A.; Guidal, M.; Houranydec, E.; Ignatov, A. S.; Kunnel, R.; Lapik, A.; Lleres, A.; Levi, Sandri P.; Mammoliti, F.; Mandaglio, G.; Manganaro, M.; Moricciani, M.; Mushkarenkov, A. N.; Nedorezov, V. G.; Randieri, C.; Rebreyend, D.; Rudnev, N. V.; Russo, G.; Schaerf, C.; Sperduto, M. L.; Sutera, M. C.; Turinge, A.
Bibliographical reference
Chinese Physics C, Volume 33, Issue 12, pp. 1249-1253 (2009).
Advertised on:
12
2009
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0
Description
The GRAAL experimental set-up consists of a polarized and tagged photon
beam that covers an energy range from a minimum of 600 MeV up to a
maximum of 1500 MeV, of a liquid Hydrogen or Deuterium target and of the
4π Lagrange detector optimized for photon detection. It allows the
study of pseudo-scalar and vector meson photoproduction on the nucleon
in the energy range corresponding to the second and the third resonance
regions. In the following, the σ beam asymmetries in η and
π0 photoproduction on quasi-free nucleon are shown. Also
single and double polarization observables in K+Λ
photoproduction on free proton are shown; they are important to confirm
the role of new or poorly known resonances in the 1900 MeV mass region.