## Dispersion relations for photon-nucleon scattering and nucleon-antinucleon production by photons |

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### Contents

Kinematics and Invariant Amplitudes | 3 |

Partial Wave Analysis | 7 |

k Double Representation | 14 |

12 other sections not shown

### Common terms and phrases

absorptive amplitudes f analytic continuation analytic properties angular distribution angular polynomials Appendix applied approximation Born terms branch cuts starting Breit system center-of-momentum channel Compton effect Cornell corresponding coupling constant crossing symmetry denominator derived Diagrams differential cross-section dispersion relations eift experimental fine-structure constant functions G. F. Chew gives Hence integral of eq.(10 interaction intermediate invariant amplitudes isospin Lawrence Radiation Laboratory Legendre polynomials low energy lowest order magnetic Mandelstam representation meson Mev photon lab momentum transfer multipole one-pion exchange contribution pair production paragraph partial helicity amplitudes partial wave amplitudes photon energy photopion resonance Phys physical region pion-nucleon scattering pion-pion resonance pole preprint production by photons proton Compton scattering quadrupole Radiation Laboratory Document Rayleigh scattering result S-matrix s-wave satisfy scalar amplitudes scatt scattering amplitude spinor terms of partial thesis total angular momentum values variable vertex