All Things EFT

Lian-Tao Wang: Sum rules in SMEFT from Helicity amplitudes.

by LianTao Wang (University of Chicago)

Europe/Zurich
Description

Based on the massless helicity amplitudes, we give a classification of the sum rules for the dim-6 operators, including some which have been missed previously. The sum rules also provide an interesting perspective for understanding the custodial symmetries of the SM Higgs and fermion sectors. Prospects of testing some of these sum rules will be presented. I will also briefly discuss possible tests of the positivity of dimension 8 operators.