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HET Brown Bag Seminar | Loops and Trees in Generic 4d EFT up to operator dimension 8

Yingying Li (Fermilab)
Wednesday, March 10, 2021
12:00-1:00 PM
Off Campus Location
I will talk about the tree and one-loop behavior in a generic 4d EFT of massless scalars, fermions, and vectors, with a particular eye to the high-energy limit of the Standard Model EFT at operator dimensions 6 and 8. First, I will show how to classify the possible Lorentz structures of operators and the subset of these that can arise at tree-level in a weakly coupled UV completion. Then I will show how operators contribute to tree and one-loop helicity amplitudes, exploring the impact of non-renormalization theorems through dimension 8 and helicity selection rules through the full one loop amplitude.
Building: Off Campus Location
Location: Virtual
Website:
Event Type: Lecture / Discussion
Tags: brown bag, Brown Bag Seminar, Physics, Science
Source: Happening @ Michigan from Leinweber Center for Theoretical Physics, Department of Physics, HET Brown Bag Series, Leinweber Center for Theoretical Physics Seminars, Leinweber Center for Theoretical Physics