title: Exchange forces in dispersion relations investigated using circuit relations.
abstract: We propose a novel method to compute in an exact manner the left-hand cut discontinuity of the electron-atom partial wave scattering amplitude in the complex energy plane within the static exchange approximation. Zero energy dispersion relations for electron-hydrogen scattering are computed numerically for illustration.
authors.affiliation: Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, Georgia 30314, USA.
authors.forename: D
authors.initials: D
authors.lastname: Vrinceanu
authors.forename: A Z
authors.initials: AZ
authors.lastname: Msezane
authors.forename: D
authors.initials: D
authors.lastname: Bessis
authors.forename: A
authors.initials: A
authors.lastname: Temkin