Year: 2015
Type: article
Abstract: We describe a theory living on the null conformal boundary $\mathcal{I}$ of four-dimensional Minkowski space, the states of which include the radiative modes of Yang--Mills theory. The action of a Kac--Moody symmetry algebra on the correlators of these states leads to a Ward identity for asymptotic ``large'' gauge transformations which is equivalent to the soft gluon theorem. The subleading soft gluon behavior is also obtained from a Ward identity for charges acting as vector fields on the sphere of null generators of $\mathcal{I}$. Correlation functions of the Yang--Mills states are shown to produce the full classical S-matrix of Yang--Mills theory. The model contains additional states arising from nonunitary gravitational degrees of freedom, indicating a relationship with the twistor string of Berkovits and Witten.
Authors: Tim Adamo, Eduardo Casali
Institution: University of Cambridge
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G2802812979, G8452291223
OpenAlex ID: W2229329391