Structure analysis of the virtual Compton scattering amplitude at low energies

Details Structure analysis of the virtual Compton scattering amplitude at low energies Structure analysis of the virtual Compton scattering amplitude at low energies

1997-04-30

arxiv.org/abs/nucl-th/9704064v2

Phys.Rev.C57:941-952,1998

Physics

Nuclear Physics

Nuclear Theory

19 pages, LaTeX2e/RevTeX, no figures, original sections IV.-VI. removed, to be discussed in a separate publication, none of th

Scientific paper

10.1103/PhysRevC.57.941

We analyze virtual Compton scattering off the nucleon at low energies in a covariant, model-independent formalism. We define a set of invariant functions which, once the irregular nucleon pole terms have been subtracted in a gauge-invariant fashion, is free of poles and kinematical zeros. The covariant treatment naturally allows one to implement the constraints due to Lorentz and gauge invariance, crossing symmetry, and the discrete symmetries. In particular, when applied to the $ep\to e'p'\gamma$ reaction, charge-conjugation symmetry in combination with nucleon crossing generates four relations among the ten originally proposed generalized polarizabilities of the nucleon.

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