Abstract
A review of our works providing a theoretical description of incoherent pion photoproduction on the deuteron is presented. The existing \(\gamma d\rightarrow \pi NN\) data are analysed, especially those obtained more recently by the CLAS Collaboration at JLab, the A2 Collaboration at MAMI at Mainz, and the PION@MAX-lab Collaboration at Lund. A procedure, which accounts for the final-state interactions (FSI), is applied to extract \(\gamma n\rightarrow \pi N\) differential cross sections from the deuteron data. The role of FSI is discussed. We also comment on the results of other works in connection with some discrepancies seen in comparing the model with experiment. The electromagnetic properties of baryon \(N^*\) resonances, improved using the extracted \(\gamma n\rightarrow \pi N\) differential cross sections are presented. A model description of the cross section data from charged-pion photoproduction reactions \(\gamma d\rightarrow \pi ^{\pm }NN\) near threshold is also given. The \(\gamma d\rightarrow \pi ^- pp\) data are used to extract the \(E_{0+}\) multipole and total cross section of the reaction \(\gamma n\rightarrow \pi ^- p\) near threshold.
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Data Availability Statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: There are no new data presented in the paper, all existing data are published and presented in the cited references.]
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WJB and IIS were supported in part by the US Department of Energy, Office of Science, Office of Nuclear Physics, under Award No. DE—SC0016583 and RLW under Award No. DE–SC0016582.
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Communicated by Evgeni Kolomeitsev.
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Briscoe, W.J., Kudryavtsev, A.E., Strakovsky, I.I. et al. On the photoproduction reactions \(\varvec{\gamma d\rightarrow \pi NN}\). Eur. Phys. J. A 58, 23 (2022). https://doi.org/10.1140/epja/s10050-022-00671-4
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DOI: https://doi.org/10.1140/epja/s10050-022-00671-4