Now showing items 11-13 of 13
Scattering equations and a new factorization for amplitudes. Part II. Effective field theories
(Springer Verlag, 2019-05-01)
We continue the program of extending the scattering equation framework by Cachazo, He and Yuan to a double-cover prescription. We discuss how to apply the double-cover formalism to effective field theories, with a special ...
Quadratic Feynman loop integrands from massless scattering equations
(American Physical Society, 2017-05-17)
Recently, the Cachazo-He-Yuan (CHY) approach has been extended to the loop level, but the resulting loop integrand has propagators that are linear in the loop momentum unlike Feynman’s. In this paper, we present a new ...
Two-loop superstring five-point amplitude and S -duality
(American Physical Society, 2016-02-24)
The low-energy limit of the massless two-loop five-point amplitudes for both type IIA and type IIB superstrings is computed with the pure spinor formalism and its overall coefficient determined from first principles. For ...