Ambitwistor strings and the scattering equations at one loop

par Prof. Lionel MASON (University of Oxford)

jeudi 15 oct. 2015, 16:45 → 17:45 Europe/Paris

Amphithéâtre Léon Motchane (IHES)

Ambitwistor strings are holomorphic string theories whose target space is the space of complex null geoedesics in a complexified space-times. I will explain how these theories explain the origin of the scattering equations in twistor strings and the CHY formulae in arbitrary dimensions and provide a reformulation of standard gauge, gravity and other theories in a holomorphic infinite tension analogue of conventional string theories. I will show how these results extend to 1-loop both on a torus and on a nodal Riemann sphere.