Speaker
Description
We discuss a new classical action that enables efficient computation of the gluonic tree amplitudes but does not contain any triple point vertices. This new formulation is obtained via a canonical transformation of the light-cone Yang-Mills action, with the field transformations based on Wilson line functionals. In addition to MHV vertices, the action contains also $N^k$MHV vertices, where $1≤k≤n−4$, and $n$ is the number of external legs. We computed tree-level amplitudes up to 9 gluons and found agreement with standard results. The classical action is however not sufficient to obtain rational parts of loop amplitudes. In order to systematically develop quantum corrections to this new action, we derive the one-loop effective action, in such a way there are no quantum contributions missing at one loop.
