Benoît Assi [HET Seminar]: Geometry, Energy, and Uncertainty in EFT

Thursday 5 Nov 2026, 10:30 → 13:00 US/Eastern

Small Seminar Room

I will present a geometric framework for EFTs that extends the notion of field-space covariance to include scalars, gauge bosons, and fermions. This approach simplifies both tree-level and quantum corrections by encoding amplitudes and one-loop divergences as geometric invariants of a field-space supermanifold. Using this formalism, we compute renormalization group equations for bosonic and fermionic operators in the SMEFT, including complete fermion-loop contributions up to dimension eight. I will also discuss a complementary EFT organization based on energy scaling and vertex structure, enabling a systematic identification of energy-enhanced operators up to dimension ten. This dual expansion in vev and kinematics provides practical guidance for SMEFT analyses at the LHC and future colliders by isolating the operators most relevant for high-energy searches. Lastly, I will discuss a new proposal on EFT truncation uncertainty in the same vein as theory nuissance parameters in QCD which is needed but lacking in modern SMEFT searches.

 

https://bnl.zoomgov.com/j/1653048131?pwd=fkT0TgSQn5wqXX55rQa3jABDwMj8sE.1