From elliptic multiple zeta values to modular graph functions: open and closed strings at one loop
High Energy Physics - Theory
2019-03-05 v2 Number Theory
Abstract
We relate one-loop scattering amplitudes of massless open- and closed-string states at the level of their low-energy expansion. The modular graph functions resulting from integration over closed-string punctures are observed to follow from symmetrized open-string integrals through a tentative generalization of the single-valued projection known from genus zero.
Keywords
Cite
@article{arxiv.1803.00527,
title = {From elliptic multiple zeta values to modular graph functions: open and closed strings at one loop},
author = {Johannes Broedel and Oliver Schlotterer and Federico Zerbini},
journal= {arXiv preprint arXiv:1803.00527},
year = {2019}
}
Comments
48+15 pages, v2: replaced with published version