Latest results from GRAAL collaboration

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V. Bellini, J.P. Bouquet, L. Casano, A. D'Angelo and J.P. Didelez. Latest results from GRAAL collaboration[J]. Chinese Physics C, 2009, 33(12): 1249-1253. doi: 10.1088/1674-1137/33/12/032
V. Bellini, J.P. Bouquet, L. Casano, A. D'Angelo and J.P. Didelez. Latest results from GRAAL collaboration[J]. Chinese Physics C, 2009, 33(12): 1249-1253.  doi: 10.1088/1674-1137/33/12/032 shu
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Received: 2009-08-07
Revised: 1900-01-01
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Latest results from GRAAL collaboration

Abstract: 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.

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