All order alpha'-expansion of superstring trees from the Drinfeld associator
High Energy Physics - Theory
2014-04-02 v2 Number Theory
Abstract
We derive a recursive formula for the alpha'-expansion of superstring tree amplitudes involving any number N of massless open string states. String corrections to Yang-Mills field theory are shown to enter through the Drinfeld associator, a generating series for multiple zeta values. Our results apply for any number of spacetime dimensions or supersymmetries and chosen helicity configurations.
Keywords
Cite
@article{arxiv.1304.7304,
title = {All order alpha'-expansion of superstring trees from the Drinfeld associator},
author = {Johannes Broedel and Oliver Schlotterer and Stephan Stieberger and Tomohide Terasoma},
journal= {arXiv preprint arXiv:1304.7304},
year = {2014}
}
Comments
6 pages, LaTeX; v2: Final version to appear in PRD