Amplitude bases in generic EFTs and the one-loop mixing matrix of dimension-8 SMEFT operators--Institute of Theoretical Physics，Chinese Academy of Sciences

Activities

Talks

Location: Home>Activities>Talks

Amplitude bases in generic EFTs and the one-loop mixing matrix of dimension-8 SMEFT operators

06/20 2022 Seminar

Title Amplitude bases in generic EFTs and the one-loop mixing matrix of dimension-8 SMEFT operators
Speaker Stefano De Angelis (Queen Marry Univ.of London)
Date 2022年6月20日 16:00
Venue Zoom link:https://us02web.zoom.us/j/87340846685?pwd=aDl3U2RoYjhEb2ZBU3dSU3QxdEUyUT09 Or Zoom number: 873 4084 6685, passcode: 407460

Abstract

I will present an efficient algorithm to find a basis of kinematically independent structures built of (massless and massive) spinor helicity variables in four dimensions. This method provides a classification of independent contact terms for the scattering amplitudes with generic masses, spins, and multiplicity in any effective field theory. These contact terms are in one-to-one correspondence with a complete set of irrelevant operators in the EFT. I will present some applications of this new method, with particular focus to the Standard Model Effective Field Theory and the calculation of one-loop mixing matrix of dimension-8 operators.