EFT anomalous dimensions from the S-matrix

Understand

We use the on-shell S-matrix and form factors to compute anomalous dimensions of higher dimension operators in the Standard Model Effective Field Theory.

• We find that in many instances, these computations are made simple by using the on-shell method.
• We first compute contributions to anomalous dimensions of operators at dimension-six that arise at one-loop.
• Then we calculate two-loop anomalous dimensions for which the corresponding one-loop contribution is absent, using this powerful method.