Two-pion exchange potential and the {pi}N amplitude

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The authors discuss the two-pion exchange potential which emerges from a box diagram with one nucleon (the spectator) restricted to its mass shell, and the other nucleon line replaced by a subtracted, covariant {pi}N scattering amplitude which includes {Delta}, Roper, and D{sub 13} isobars, as well as contact terms and off-shell (non-pole) dressed nucleon terms. The {pi}N amplitude satisfies chiral symmetry constraints and fits {pi}N data below {approximately} 700 MeV pion energy. They find that this TPE potential can be well approximated by the exchange of an effective sigma and delta meson, with parameters close to the ones used in ... continued below

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282 Kilobytes pages

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Pena, M. T.; Gross, Franz & Surya, Yohanes May 1, 1996.

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The authors discuss the two-pion exchange potential which emerges from a box diagram with one nucleon (the spectator) restricted to its mass shell, and the other nucleon line replaced by a subtracted, covariant {pi}N scattering amplitude which includes {Delta}, Roper, and D{sub 13} isobars, as well as contact terms and off-shell (non-pole) dressed nucleon terms. The {pi}N amplitude satisfies chiral symmetry constraints and fits {pi}N data below {approximately} 700 MeV pion energy. They find that this TPE potential can be well approximated by the exchange of an effective sigma and delta meson, with parameters close to the ones used in one-boson-exchange models that fit NN data below the pion production threshold.

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282 Kilobytes pages

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  • Journal Name: Phys.Rev. C54 (1996) 2235-2239; Other Information: Submitted to Phys.Rev. C54 (1996) 2235-2239

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  • Report No.: DOE/ER/40150-1602
  • Report No.: CFNUL-96-04
  • Report No.: WM-96-106
  • Report No.: CEBAF-TH-96-11
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 756661
  • Archival Resource Key: ark:/67531/metadc708893

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Office of Scientific & Technical Information Technical Reports

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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  • May 1, 1996

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 5, 2016, 8:42 p.m.

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Pena, M. T.; Gross, Franz & Surya, Yohanes. Two-pion exchange potential and the {pi}N amplitude, article, May 1, 1996; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc708893/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.