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Il Nuovo Cimento A (1965-1970)

, Volume 42, Issue 2, pp 421–425 | Cite as

On the electromagnetic and weak form factors of the nucleon

  • G. Cocho
Lettere Alla Redazione

Keywords

Form Factor Dynamical Calculation Electromagnetic Form Factor Physical Masse Neutrino Reaction 
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References

  1. (1).
    R. Delbourgo, M. A. Rashid, A. Salam andJ. Strathdee: The\(\tilde U_{12} \) Symmetry, IC/65/57 (Trieste). [Published in theProceedings of the Seminar on High-Energy Physics and Elementary Particles, Trieste, 1965 (IAEA, Vienna).]Google Scholar
  2. (2).
    P. G. O. Freund andR. Oehme:Phys. Rev. Lett.,14, 1085 (1965).ADSMathSciNetCrossRefGoogle Scholar
  3. (3).
    E. B. Hughes, T. A. Griffy, M. R. Yearian andR. Hofstadter:Phys. Rev.,139, B 458 (1965).ADSCrossRefGoogle Scholar
  4. (4).
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  5. (5).
    J. S. Ball andD. Y. Wong:Phys. Rev.,130, 2112 (1963).ADSCrossRefGoogle Scholar
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    K. W. Chen, A. A. Cone, J. R. Dunning jr.,S. G. Frank, N. F. Ramsey, J. K. Walker andR. Wilson:Phys. Rev. Lett.,11, 561 (1963);J. R. Dunning, K. W. Chen, A. A. Cone, G. Hartwig, N. F. Ramsey, J. K. Walker andR. Wilson:Phys. Rev. Lett.,13, 631 (1964).ADSCrossRefGoogle Scholar
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    The experimental data have been taken fromE. B. Hughes et al. [ref. (3)] ;K. W. Chen et al., andJ. R. Dunning et al. [ref (6)]Phys. Rev. Lett.,11, 561 (1963);J. R. Dunning, K. W. Chen, A. A. Cone, G. Hartwig, N. F. Ramsey, J. K. Walker andR. Wilson:Phys. Rev. Lett.,13, 631 (1964).ADSCrossRefGoogle Scholar
  11. (11).
    With this value ofm ϱ the theoretical curves of Fig. 1, 2 and 3 are almost unchanged if we take Λ≃1 GeV.Google Scholar
  12. (12).
    \(\Delta = m_\rho ^M - m_\rho ^E = 20\) MeV is a quite reasonable value to expect. See ref. (5).ADSCrossRefGoogle Scholar
  13. (13).
    As the cut-off Λ might correspond to the opennig of the πϱ and πω channels, perhaps the correction μ-μ0 is in a large part due to different contributions of such channels to the electric and magnetic form factors. In such a case one might represent them for two different cut-offsΛ M andΛ E. However, dynamical calculations are needed in order to estimate such effect.Google Scholar
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    M. M. Block, H. Burmeister, D. C. Cundy, B. Eiben, C. Franzinetti, J. Keren, R. Møllerud, G. Myatt, M. Nikolic, A. Orkin-Lecourtois, M. Paty, D. H. Perkins, C. A. Ramm, K. Schultze, H. Sletten, K. Soop, W. Venus andH. Yoshiki:Phys. Lett.,12, 281 (1964).ADSCrossRefGoogle Scholar
  15. (15).
    Due to the large width of the A1 resonance one expects a shifting of the effective position of the pole.Google Scholar

Copyright information

© Società Italiana di Fisica 1966

Authors and Affiliations

  • G. Cocho
    • 1
  1. 1.International Atomic Energy AgencyInternational Centre for Theoretical PhysicsTrieste

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