Unitary, gauge invariant, relativistic resonance model for pion photoproduction

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Pion photoproduction up to 770 MeV photon laboratory energy is described by a manifestly covariant wave equation, which includes a treatment of the final state {pi}N interactions consistent with the covariant, unitary, resonance model of pi-N scattering previously developed. The kernel of the equation includes nucleon (N), Roper (N*), Delta, and D{sub 13} poles and their crossed poles, as well as {pi}, {mu}, and w exchange terms. The Kroll-Ruderman term and other interaction currents insure that the model is exactly gauge invariant to all orders in the strong coupling, g{sub {pi}NN}, and that the low energy theorem is satisfied. Unitarity ... continued below

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1307 Kilobytes pages

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Surya, Y. & Gross, F. July 1, 2000.

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Pion photoproduction up to 770 MeV photon laboratory energy is described by a manifestly covariant wave equation, which includes a treatment of the final state {pi}N interactions consistent with the covariant, unitary, resonance model of pi-N scattering previously developed. The kernel of the equation includes nucleon (N), Roper (N*), Delta, and D{sub 13} poles and their crossed poles, as well as {pi}, {mu}, and w exchange terms. The Kroll-Ruderman term and other interaction currents insure that the model is exactly gauge invariant to all orders in the strong coupling, g{sub {pi}NN}, and that the low energy theorem is satisfied. Unitarity is maintained up to first order in the charge e (Watson theorem). The complete development of this model, which gives a good fit to all the data up to 770 MeV, is presented.

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1307 Kilobytes pages

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  • Report No.: DOE/ER/40150-1584
  • Report No.: CEBAF-TH-95-04
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 756542
  • Archival Resource Key: ark:/67531/metadc709998

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • March 30, 2016, 11:55 a.m.

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Surya, Y. & Gross, F. Unitary, gauge invariant, relativistic resonance model for pion photoproduction, article, July 1, 2000; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc709998/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.