The box diagram in Yukawa theory
High Energy Physics - Theory
2008-11-26 v1 Nuclear Theory
Abstract
We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In light-front dynamics, however, individual time-ordered diagrams are divergent. We analyze the corresponding light-front singularities and show the equivalence between the light-front and covariant results by taming the singularities.
Cite
@article{arxiv.hep-th/0610309,
title = {The box diagram in Yukawa theory},
author = {Bernard L. G. Bakker and Jorn K. Boomsma and Chueng-Ryong Ji},
journal= {arXiv preprint arXiv:hep-th/0610309},
year = {2008}
}
Comments
21 pages, 17 figures. submittes to Phys. Rev. D