Precise measurements of the differential cross section and the beam polarization asymmetry E have been obtained by the GRAAL collaboration for the (gamma) over right arrow + p --> n + p and the (gamma) over right arrow + p --> pi(0) + p reactions, at incoming photon energies up to 1.48 GeV. Preliminary data are presented and compared with different theoretical calculations. First measurements of the E observable are also available for the (gamma) over right arrow + p --> K(+)Lambda reaction channel.
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Old Dominion Univ, Norfolk, VA 23529 USAIst Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
Dodge, G. E.
Doughty, D.
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Christopher Newport Univ, Newport News, VA 23606 USA
Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USAIst Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
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Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USATexas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
Riek, F.
Rapp, R.
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Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USATexas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
Rapp, R.
Lee, T. -S. H.
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Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA
Argonne Natl Lab, Div Phys, Argonne, IL 60439 USATexas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
Lee, T. -S. H.
Oh, Yongseok
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Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USATexas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
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Univ Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
IPARCOS, Madrid 28040, SpainUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Mathieu, V
Pilloni, A.
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European Ctr Theoret Studies Nucl Phys & Related, I-38123 Villazzano, Trento, Italy
Fdn Bruno Kessler, I-38123 Villazzano, Trento, Italy
Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, ItalyUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Pilloni, A.
Albaladejo, M.
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Thomas Jefferson Natl Accelerator Facil, Theory Ctr, Newport News, VA 23606 USAUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Albaladejo, M.
Bibrzycki, L.
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Thomas Jefferson Natl Accelerator Facil, Theory Ctr, Newport News, VA 23606 USA
Indiana Univ, Phys Dept, Bloomington, IN 47405 USA
Pedag Univ Cracow, Inst Comp Sci, PL-30084 Krakow, PolandUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Bibrzycki, L.
Celentano, A.
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Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, ItalyUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Celentano, A.
Fernandez-Ramirez, C.
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Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ciudad De Mexico 04510, MexicoUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain
Fernandez-Ramirez, C.
Szczepaniak, A. P.
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Thomas Jefferson Natl Accelerator Facil, Theory Ctr, Newport News, VA 23606 USA
Indiana Univ, Phys Dept, Bloomington, IN 47405 USA
Indiana Univ, Ctr Explorat Energy & Matter, Bloomington, PA USAUniv Complutense Madrid, Dept Fis Teor, Madrid 28040, Spain