caa a22 4500 445873256 CHVBK 20180317145519.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1140/epja/i2011-11143-y doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11143-y Model dependence of single-energy fits to pion photoproduction data [Elektronische Daten] [R. Workman, M. Paris, W. Briscoe, L. Tiator, S. Schumann, M. Ostrick, S. Kamalov] Abstract.: Model dependence of multipole analysis has been explored through energy-dependent and single-energy fits to pion photoproduction data. The MAID energy-dependent solution has been used as input for an event generator producing realistic pseudo data. These were fitted using the SAID parametrization approach to determine single-energy and energy-dependent solutions over a range of lab photon energies from 200 to 1200MeV. The resulting solutions were found to be consistent with the input amplitudes from MAID. Fits with a χ-squared per datum of unity or less were generally achieved. We discuss energy regions where consistent results are expected, and explore the sensitivity of fits to the number of included single- and double-polarization observables. The influence of Watson's theorem is examined in detail. SIF, Springer-Verlag Berlin Heidelberg, 2011 Workman R. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut Paris M. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut Briscoe W. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut Tiator L. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut Schumann S. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut Ostrick M. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut Kamalov S. Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980, Moscow Region, Russia aut The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-12 1434-6001 47:11<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11143-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11143-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Workman R. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut NATIONALLICENCE 700 1- Paris M. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut NATIONALLICENCE 700 1- Briscoe W. Center for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, D.C., USA aut NATIONALLICENCE 700 1- Tiator L. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut NATIONALLICENCE 700 1- Schumann S. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut NATIONALLICENCE 700 1- Ostrick M. Institut für Kernphysik, Johannes Gutenberg Universität, D-55099, Mainz, Germany aut NATIONALLICENCE 700 1- Kamalov S. Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980, Moscow Region, Russia aut NATIONALLICENCE 773 0- The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-12 1434-6001 47:11<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer