期刊
EUROPEAN PHYSICAL JOURNAL A
卷 26, 期 3, 页码 399-419出版社
SPRINGER
DOI: 10.1140/epja/i2005-10191-2
关键词
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Neutral pion photoproduction has been measured from 550 to 1500 MeV with the GRAAL facility, located at the ESRF in Grenoble. Differential cross-section and beam asymmetry have been measured over a wide angular range. These high-precision data improve significantly the database for the beam asymmetry in the second and third resonance regions covering for the first time the energy domain 1100-1500 MeV. New partial-wave analyses including these data are presented for which the beam asymmetry brings crucial constraints.
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