Frazer, W.R.; Fulco, J.R.; Effect of a Pion Pion Scattering Resonance on Nucleon Structure. II
Phys. Rev. 117 (1960) 1609;

Summary
It is shown that a resonance of suitable position and width in the J = 1, I = 1 state of the pion-pion system can bring the dispersion-theoretic calculation of the isotopic vector part of the nucleon electromagnetic structure into agreement with experiment. The calculation of the isotopic-vector part of the nucleon form factors involves in first approximationthe pion form factor and the matrix element for the production by two pions of a nucleon antinucleon pair. For the pion form factor we
used a semifenomenological solution based on the work of Chew and Mandelstam and involving two parameters related to the position and width of the resonance. For the nucleon amplitude we used the results of the preceding paper.

Related references More (earlier) information appears in W. R. Frazer and J. R. Fulco, Phys. Rev. 117 (1960) 1603;
W. R. Frazer and J. R. Fulco, Phys. Rev. Lett. 2 (1959) 365;
See also P. Federbush, M. L. Goldberger, and S. B. Treiman, Phys. Rev. 112 (1958) 642;
G. F. Chew, R. Karplus, S. Gasiorowicz, and F. Zachariasen, Phys. Rev. 110 (1958) 265;
W. G. Holliday, Phys. Rev. 101 (1956) 1198;
M. Jacob and G. C. Wick, Ann.Phys. 7 (1959) 404;
S. Mandelstam, Phys. Rev. 112 (1958) 1344;
S. Mandelstam, Phys. Rev. 115 (1959) 1741;
S. Mandelstam, Phys. Rev. 115 (1959) 1752;
Analyse data from R. Hofstadter, F. Bumiller, and M. R. Yearian, Rev. of Mod. Phys. 30 (1958) 482;
W. D. Walker, J. Davis, and W. D. Shephard, Phys. Rev. 118 (1960) 1612;

Reactions

e^{–} p p e^{–}

angp

Reactions

nucleon

amp

^{+}^{–}^{+}^{–}

cs

Particles studied

ex, qn

Record comments
Prediction of the spin = 1, isospin = 1 resonance in the two-pion system.