Nucleon Electromagnetic Form Factors

  • James J. Kelly
Chapter
Part of the NATO Science Series II: Mathematics, Physics and Chemistry book series (NAII, volume 111)

Abstract

We review data for nucleon electromagnetic form factors, emphasizing recent measurements of G E/GM that use recoil or target polarization to minimize systematic errors and model dependence. The data are parametrized in terms of densities that are consistent with the Lorentz contraction of the Breit frame and with pQCD. The dramatic linear decrease in G Ep /G Mp for 1 ≤ Q 2 ≤ 6 (GeV/c)2 demonstrates that the charge is broader than the magnetization of the proton. High precision recoil polarization measurements of G En show clearly the positive core and negative surface charge of the neutron. Combining these measurements, we display spatial densities for u and d quarks in nucleons.

Keywords

Form Factor Systematic Uncertainty Positive Core Magnetic Form Factor Quark Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. 1.
    J. D. Bjorken and S. D. Drell, Relativistic Quantum Mechanics (McGraw-Hill, New York, 1964).Google Scholar
  2. 2.
    R. G. Sachs, Phys. Rev. 126, 2256 (1962).MathSciNetADSMATHCrossRefGoogle Scholar
  3. 3.
    E. B. Hughes, T. A. Griffey, M. R. Yearian, and R. Hofstadter, Phys. Rev. 139, B458 (1965).ADSCrossRefGoogle Scholar
  4. 4.
    J. J. R. Dunning, K. W. Chen, A. A. Cone, G. Hartwig, N. F. Ramsey, J. K. Walker, and R. Wilson, Phys. Rev. 141, 1286 (1966).ADSCrossRefGoogle Scholar
  5. 5.
    N. Dombey, Rev. Mod. Phys. 41, 236 (1969).ADSCrossRefGoogle Scholar
  6. 6.
    R. G. Arnold, C. E. Carlson, and F. Gross, Phys. Rev. C 23, 363 (1981).ADSGoogle Scholar
  7. 7.
    M. K. Jones et al., Phys. Rev. Lett. 84, 1398 (2000).ADSCrossRefGoogle Scholar
  8. 8.
    O. Gayou et al., Phys. Rev. Lett. 88, 092301 (2002).ADSCrossRefGoogle Scholar
  9. 9.
    R. C. Walker et al., Phys. Rev. D 49, 5671 (1994).ADSGoogle Scholar
  10. 10.
    L. Andivahis et al., Phys. Rev. D 50, 5491 (1994).ADSGoogle Scholar
  11. 11.
    J. Arrington, arXiv:nucl-ex/0205019 (unpublished).Google Scholar
  12. 12.
    J. Arrington et al., Jefferson Laboratory proposal E01-001, 2001.Google Scholar
  13. 13.
    B. D. Milbrath et al., Phys. Rev. Lett. 82, 2221 (1999).ADSCrossRefGoogle Scholar
  14. 14.
    T. Pospischil et al., Eur. Phys. J. A 12, 125 (2001).ADSCrossRefGoogle Scholar
  15. 15.
    C. Herberg et al., Eur. Phb ys. J. A 5, 131 (1999).ADSCrossRefGoogle Scholar
  16. 16.
    J. Golak, G. Ziemer, H. Kamada, H. Witala, and W. Glöckle, Phys. Rev. C 63, 034006 (2001).ADSGoogle Scholar
  17. 17.
    D. Rohe et al., Phys. Rev. Lett. 83, 4257 (1999).ADSCrossRefGoogle Scholar
  18. 18.
    I. Passchier et al., Phys. Rev. Lett. 82, 4988 (1999).ADSCrossRefGoogle Scholar
  19. 19.
    H. Zhu et al., Phys. Rev. Lett. 87, 081801 (2001).ADSCrossRefGoogle Scholar
  20. 20.
    R. Madey et al., to be published in Proceedings of Electron Nucleus Scattering VII by Eur. Phys. J. A (unpublished).Google Scholar
  21. 21.
    R. Schiavilla and I. Sick, Phys. Rev. C 64, 041002(R) (2001).ADSGoogle Scholar
  22. 22.
    S. Kopecky, J. A. Harvey, N. W. Hill, M. Krenn, M. Pernicka, P. Riehs, and S. Steiner, Phys. Rev. C 56, 2220 (1997).ADSGoogle Scholar
  23. 23.
    S. Galster, H. Klein, J. Moritz, K. Schmidt, D. Wegener, and J. Bleckwenn, Nucl. Phys. B32, 221 (1971).ADSCrossRefGoogle Scholar
  24. 24.
    H. Schmieden, in Proceedings of the 8th International Conference on the Structure of Baryons, edited by D. W. Menze and B. Metsch (World Scientific, Singapore, 1999), pp. 356–367.Google Scholar
  25. 25.
    S. Platchkov et al., Nucl. Phys. A 510, 740 (1990).ADSGoogle Scholar
  26. 26.
    H. Arenhövel, Phys. Lett. B199, 13 (1987).ADSGoogle Scholar
  27. 27.
    G. Holzwarth, Zeit. Phys. A 356, 339 (1996).ADSGoogle Scholar
  28. 28.
    G. Holzwarth, arXiv:hep-ph/0201138 (unpublished).Google Scholar
  29. 29.
    B.-Q. Ma, D. Qing, and I. Schmidt, Phys. Rev. C 65, 035205 (2002).ADSGoogle Scholar
  30. 30.
    R. Wagenbrunn, S. Boffi, W. Klink, W. Plessas, and M. Radici, Phys. Lett. B 511, 33 (2001).ADSGoogle Scholar
  31. 31.
    S. Simula, arXiv:nucl-th/0105024 (unpublished).Google Scholar
  32. 32.
    G. Cates et al., Jefferson Laboratory proposal E02-013, 2002.Google Scholar
  33. 33.
    E. L. Lomon, arXiv:nucl-th/0203081 (unpublished).Google Scholar
  34. 34.
    M. F. Gari and W. Krümpelmann, Zeit. Phys. A 322, 689 (1985).ADSGoogle Scholar
  35. 35.
    A. L. Licht and A. Pagnamenta, Phys. Rev. D 2, 1156 (1970).ADSGoogle Scholar
  36. 36.
    A. N. Mitra and I. Kumari, Phys. Rev. D 15, 261 (1977).ADSGoogle Scholar
  37. 37.
    X. Ji, Phys. Lett. B254, 456 (1991).ADSGoogle Scholar
  38. 38.
    J. J. Kelly, arXiv:hep-ph/0204239 (unpublished).Google Scholar
  39. 39.
    G. G. Simon, C. Schmitt, F. Borkowski, and V. H. Walther, Nucl. Phys. A333, 381 (1980).ADSGoogle Scholar
  40. 40.
    L. E. Price, J. R. Dunning, M. Goitein, K. Hanson, T. Kirk, and R. Wilson, Phys. Rev. D 4, 45 (1971).ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • James J. Kelly
    • 1
  1. 1.Department of PhysicsUniversity of MarylandCollege Park

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