## Relativistic quantum fields |

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### Contents

General Formalism | 3 |

The KleinGordon Field | 25 |

Second Quantization of the Dirac Field | 43 |

Copyright | |

6 other sections not shown

### Common terms and phrases

according analogy analytic properties anticommutation antiparticle asymptotic calculation canonical Chap charge coefficients commutation relations condition conjugate conservation constant construct contribution convergent coordinate corresponding coupling covariant defined degree of divergence denominator derived Dirac field discussed dispersion relation electromagnetic field electron energy example expansion external lines external momenta fermion Feynman graphs Feynman propagator field equations field operators finite free-field gauge given hamiltonian hermitian illustrated in Fig interaction internal introduced isotopic spin Klein-Gordon lagrangian density Lorentz invariance matrix elements mesons momentum space normal nucleon one-particle parity particles perturbation theory photon line Phys physical pion plane positron problem quantum electrodynamics quantum field theory reduced graphs region renormalization program S-matrix satisfy scattering amplitude self-energy self-energy insertions singularities space-like spectral spinor subgraphs subintegrations symmetry tion unitarity vacuum expectation value vacuum polarization vanishes vector verify vertex functions vertex insertions Ward identity wave functions Weinberg's theorem write zero