# Universality in string interactions

If you have a question about this talk, please contact INI IT.

GTAW01 - General relativity: from geometry to amplitudes

Co-Authors: Yu-tin Huang (National Taiwan University), Congkao Wen (Tor Vergata Rome)

In this talk based on arXiv:1602.01674, we provide evidence for universality in the low-energy expansion of tree-level string interactions. More precisely, in the $\alpha'$-expansion of tree-level scattering amplitudes, we conjecture that the leading transcendental coefficient at each order in $\alpha'$ is universal for all perturbative string theories. We have checked this universality up to seven points and trace its origin to the ability to restructure the disk integrals of open bosonic string into those of the superstring. The accompanying kinematic functions have the same low-energy limit and do not introduce any transcendental numbers in their $\alpha'$-corrections. Universality in the closed-string sector then follows from the Kawai-Lewellen-Tye-relations.

This talk is part of the Isaac Newton Institute Seminar Series series.

Tell a friend about this talk:

## This talk is included in these lists:

Note that ex-directory lists are not shown.

© 2006-2023 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity