A new all-loop Schwinger-type parameterization of worldsheet (super) moduli is presented. This clarifies how the low-energy limit of (open) string amplitudes yields a sum over gauge theory Feynman diagrams in the worldline formalism. Super Riemann surfaces and Schottky groups are briefly reviewed.
Friday, October 7, 2016 - 13:00
Multi-loop open string amplitudes and Feynman diagrams