IPM Calendar 
Friday 24 May 2024   Today  
Events for day: Sunday 26 May 2024    
           15:00 - 16:00     Theory weekly seminar (TWS)
Modular graph forms and their integrals

School
PARTICLES AND ACCELERATORS

Abstract:
Low-energy expansion of the scattering amplitude of closed strings at one-loop (genus one surfaces) results in an integral over the moduli space of the n-punctured torus. The integral can be split into an integral over the configuration space of the punctures and an integral over the moduli space of tori. The low-energy expansion of the first integral has a diagrammatic description called modular graph forms (MGFs). I will give a review of the recent developments in writing MGFs as equivariant iterated integrals of modular forms (based on 2403.14816). If time permits, I will talk about their integrals over the moduli space o ...