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From elliptic multiple zeta values to modular graph functions: open and closed strings at one loop

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Zerbini,  Federico
Max Planck Institute for Mathematics, Max Planck Society;

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Citation

Broedel, J., Schlotterer, O., & Zerbini, F. (2019). From elliptic multiple zeta values to modular graph functions: open and closed strings at one loop. Journal of High Energy Physics, 2019(1): 155. doi:10.1007/JHEP01(2019)155.


Cite as: http://hdl.handle.net/21.11116/0000-0004-885D-B
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.