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Prog. Theor. Phys. Vol. 44 No. 1 (1970) pp. 193-218

[ Full Text PDF : FREE ACCESS (1369K) ]

Electromagnetic Inelastic Form Factors of Processes ep →eN* in a Relativistic Extended Particle Model Based on the Quark Model

Kimio Fujimura, Tsunehiro Kobayashi and Mikio Namiki

Department of Physics, Waseda University, Tokyo

(Received February 5, 1970)

Abstract:

The electromagnetic inelastic form factors of ep →eN* are calculated in a covariant way, on the basis of a relativistic extended-particle model introduced as a straight-forward extension of the nonrelativistic quark model. It is shown that the inelastic form factors have the same q2-dependence as the elastic one at higher momentum transfers, that is,
(dσ/dΩ)inel/(dσ/dΩ)el → const
for q2 larger than the nucleon mass. This theoretical result, coming mainly from the Lorentz contraction of the nucleon as an extended particle, is consistent with recent experiment.
The nucleon elastic form factors are also discussed in the same framework of the model. In particular it is shown that the neutron electric form factor appearing as a relativistic effect is consistent with existing experimental data.


URL : http://ptp.ipap.jp/link?PTP/44/193/
DOI : 10.1143/PTP.44.193

[ Full Text PDF : FREE ACCESS (1369K) ] Citation:

References:

  1. K. Fujimura, T. Kobayashi and M. Namiki, Prog. Theor. Phys. 43 (1970), 73[PTP].
  2. L. W. Mo, SLAC-PUB-660 September 1969.
    E. D. Bloom, D. H. Coward, H. DeStaebler, J. Press, G. Miller, L. W. Mo, R. E. Taylor, M. Bleidenbach, J. I. Friedman, G. C. Hartmann and H. W. Kendall, Phys. Rev. Lett. 23 (1969), 930[APS]; ibid. 23 (1969), 935[APS].
  3. Y. Kinoshita, T. Kobayashi, S. Machida and M. Namiki, Prog. Theor. Phys. 36 (1966), 107[PTP].
    S. Ishida, K. Konno and H. Shimodaira, Prog. Theor. Phys. 36 (1966), 1243[PTP].
    Recently we have received an article by S. Ishida, U. Oseguera-Valladares and P. Roman (Boston University preprint 1969), in which they discuss the elastic and inelastic form factors for large q2 using another type of electromagnetic current to keep the full scaling law.
  4. K. Fujimura, T. Kobayashi, T. Kobayashi and M. Namiki, Prog. Theor. Phys. 37 (1967), 916[PTP]; ibid. 38 (1967), 210[PTP].
    Unfortunately these papers include some mistakes. See Appendix III.
  5. W. K. H. Panofsky, The XIV International Conference on High Energy Physics, Vienna (1968).
  6. J. D. Bjorken and J. D. Walecka, Ann. of Phys. 38 (1966), 35[CrossRef].
  7. H. J. Skronn, DESY F35-68/2 (1968).
  8. T. Takabayashi, Phys. Rev. 139 (1965), B1381[APS].

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