Cross-ladder effects in Bethe-Salpeter and Light-Front equations
High Energy Physics - Theory
2009-11-11 v2 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
Bethe-Salpeter (BS) equation in Minkowski space for scalar particles is solved for a kernel given by a sum of ladder and cross-ladder exchanges. The solution of corresponding Light-Front (LF) equation, where we add the time-ordered stretched boxes, is also obtained. Cross-ladder contributions are found to be very large and attractive, whereas the influence of stretched boxes is negligible. Both approaches -- BS and LF -- give very close results.
Cite
@article{arxiv.hep-th/0505262,
title = {Cross-ladder effects in Bethe-Salpeter and Light-Front equations},
author = {J. Carbonell and V. A. Karmanov},
journal= {arXiv preprint arXiv:hep-th/0505262},
year = {2009}
}
Comments
11 pages, 7 figures