Electromagnetic form factor via Minkowski and Euclidean Bethe-Salpeter amplitudes

Abstract

The electromagnetic form factors calculated through Euclidean Bethe-Salpeter amplitude and through the light-front wave function are compared with the one found using the Bethe-Salpeter amplitude in Minkowski space. The form factor expressed through the Euclidean Bethe-Salpeter amplitude (both within and without static approximation) considerably differs from the Minkowski one, whereas form factor found in the light-front approach is almost indistinguishable from it.

3 pages, 2 figures. Contribution to the proceedings of the 20th International Conference on Few-Body Problems in Physics (FB20), Pisa, Italy, September 10-14, 2007. To be published in "Few-Body Systems"

References in corpus (4)

• Explicitly Covariant Light-Front Dynamics and Relativistic Few-Body Systems
• Solving Bethe-Salpeter equation in Minkowski space
• Cross-ladder effects in Bethe-Salpeter and Light-Front equations
• Bethe-Salpeter equation with cross-ladder kernel in Minkowski and Euclidean spaces

Cited by in corpus (4)

• Solutions of the Bethe-Salpeter equation in Minkowski space and applications to electromagnetic form factors
• Schroedinger models for solutions of the Bethe-Salpeter equation in Minkowski space
• Relative variables of the exact fermion-antifermion bound state wave-function in the Schwinger Model
• Relative energy dependence of the Bethe-Salpeter amplitude in two-dimensional massless QED