Mon, 28 May 2018
12:45
12:45
L3
Modular properties of supersttring scattering amplitudes,
Michael Green
(Cambridge and QMUL)
Abstract
The coefficients of the low energy expansion of closed string amplitudes transform as automorphic functions under En(Z) U-duality groups.
The seminar will give an overview of some features of the coefficients of low order terms in this expansion, which involve a fascinating interplay between multiple zeta values and certain elliptic and hyperelliptic generalisations, Langlands Eisenstein series for the En groups, and the ultraviolet behaviour of maximally supersymmetric supergravity.