Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-10-05
Physics
Nuclear Physics
Nuclear Theory
4 pages, 1 figure, invited talk for the 12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleo
Scientific paper
The near-term objectives of the research program at the Data Analysis Center are established within the context of the existing partial wave analyses available through the online suite of analysis and database codes accessible through SAID, the Scattering Analysis Interactive Database. This presentation reviews the efforts to determine a model independent method to obtain sets of partial wave amplitudes for strong and electromagnetic reactions, the interpretation of the amplitudes in terms of the excited states of the nucleon, the role of new precision unpolarized and polarized data, and new developments aimed at determining the photoproduction mulitpoles in a unitary, coupled-channel approach. The Chew-Mandelstam technique is discussed and applied to the problem of the S-wave pion- and eta-photoproduction amplitudes. The resulting eta production amplitudes exhibit the expected resonant behavior near the eta production threshold. Application of this method to a unified description of the hadro- and photoproduction amplitudes is discussed.
Arndt Richard A.
Briscoe William J.
Paris Mark W.
Strakovsky Igor I.
Workman Ron L.
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