## A Study of Gauge Properties of the Bethe-Salpeter Equation for Two Fermion Bound State Systems |

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### Contents

Table of Contents contd | 8 |

BETHESALPETER EQUATION STANDARD LORE | 11 |

Fi gure Page | 15 |

27 other sections not shown

### Common terms and phrases

annihilation graphs arises axial gauges B-S equation B-S irreducible kernel B-S kernel B-S wave function Bethe-Salpeter equation binding energy bound state energies bound state equation bound state systems center of mass Chapter charge conjugation class of covariant consider contribution to AE covariant gauges cross graphs crossed photon kernel Dirac equation dominant binding dominant contributions electromagnetic bound energy eigenvalue energy shift explicitly demonstrated expression F-W transformations Feynman gauge Figure full B-S gauge invariant given in Fig Green function higher order hyperfine splitting hyperfine structure infinite number instantaneous Coulomb photon instantaneous interactions instantaneous piece ladder approximation leading contribution m(Za mass shell momentum rootings muonium n(Za non-instantaneous ladders non-instantaneous photon non-radiation gauges number of kernels obtain particle particle-antiparticle bound perturbation theory photon crossing photon propagator pole configurations positronium radiation gauge Salpeter equation scalar Schrodinger equation Section time-ordered two-body Green function two-fermion bound unperturbed wave functions Wick rotation