The On-Shell Path to Effective Field Theories: Anomalous Dimensions and Unitarity Bounds

by Luigi Bresciani

Friday 1 May 2026, 12:30 → 14:30 America/Los_Angeles

48/2-224 - Madrone (SLAC)

Modern on-shell amplitude methods provide an efficient framework to address two central questions of the effective field theory (EFT) program: how Wilson coefficients run, and for which values they admit a consistent UV completion. I will present an on-shell framework based on unitarity cuts of form factors to compute anomalous dimensions, with applications to the CP-violating axion-like particle EFT and to a general effective gauge theory. I will also discuss a vectorial formulation of partial-wave unitarity bounds applicable to arbitrary N-to-M processes and higher-spin theories, with applications to the Standard Model EFT, gravity, and axion-like particles.

SLAC_seminar (2).pdf