750 articles – 7453 Notices  [english version]
 HAL : in2p3-00169529, version 1
 arXiv : 0705.0816
 Physical Review C 76 (2007) 025211
 $\pi^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV
 CLAS Collaboration(s)
 (2007)
 Differential cross sections for the reaction $\gamma p \to p \pi^0$ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess greater accuracy in the absolute normalization than previous measurements. They disagree with recent CB-ELSA measurements for the process at forward scattering angles. Agreement with the SAID and MAID fits is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been extended to 3 GeV. Resonance couplings have been extracted and compared to previous determinations.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0705.0816
 in2p3-00169529, version 1 http://hal.in2p3.fr/in2p3-00169529 oai:hal.in2p3.fr:in2p3-00169529 Contributeur : Dominique Girod <> Soumis le : Mardi 4 Septembre 2007, 11:48:44 Dernière modification le : Mardi 4 Septembre 2007, 11:53:43