Two-loop scalar diagrams from string theory
High Energy Physics - Theory
2009-10-30 v1
Abstract
We show how to obtain correctly normalized expressions for the Feynman diagrams of theory with an internal symmetry group, starting from tachyon amplitudes of the open bosonic string, and suitably performing the zero--slope limit by giving an arbitrary mass to the tachyon. In particular we present explicit results for the two--loop amplitudes of theory, in preparation for the more interesting case of the multiloop amplitudes of non--abelian gauge theories.
Keywords
Cite
@article{arxiv.hep-th/9607141,
title = {Two-loop scalar diagrams from string theory},
author = {Paolo Di Vecchia and Alberto Lerda and Lorenzo Magnea and Raffaele Marotta and Rodolfo Russo},
journal= {arXiv preprint arXiv:hep-th/9607141},
year = {2009}
}
Comments
15 pages, plain Latex, 5 figures included