Speaker
Description
In gauge theories and gravity, the scattering amplitudes of any number of external particles under the soft limit reduce to amplitudes with one less number of external particles times a universal soft factor. Higher-order interaction vertices (or scattering amplitudes) in a theory can be built up from the lower-order vertices (amplitudes) by using a multiplicative universal factor associated with the emission of a soft boson.
In this talk, I will first, for example, explain how universal soft factors for Yang-Mills theory and gravity can be extracted from their respective light-cone actions and how to construct higher point interaction vertices using the soft factor. I will then discuss soft theorems in the context of maximally supersymmetric field theories and explain the construction of interaction vertices of N = 8 supergravity.
| Session | Formal Theory |
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