Integral Representations of Two-Point Functions
- 1 January 1960
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 117 (1) , 273-279
- https://doi.org/10.1103/physrev.117.273
Abstract
An integral representation for a general matrix element of two field operators between eigenstates labelled by an arbitrary number of momenta is presented. This representation is conveniently parametrized over a set of invariants related to the total momentum and momentum transfer, and explicitly incorporates spectral conditions. Physically interesting dispersion relations for off-forward scattering cannot be obtained from this representation alone.Keywords
This publication has 2 references indexed in Scilit:
- Structure of the Forward Scattering AmplitudePhysical Review B, 1960
- Structure of the Vertex FunctionPhysical Review B, 1959