We present a complete basis of dimension-8 operators in the Standard Model Effective Field Theory. Attention is paid to operators that vanish in the absence of flavor structure. There are dimension-8 SMEFT 44,807 operators. We also briefly discuss a few aspects of phenomenology involving dimension-8 operators, including light-by-light scattering and electroweak precision data.
Cite
@article{arxiv.2005.00059,
title = {Dimension-8 Operators in the Standard Model Effective Field Theory},
author = {Christopher W. Murphy},
journal= {arXiv preprint arXiv:2005.00059},
year = {2022}
}
Comments
50 pages, 21 tables; v6: minor update, $\epsilon \tau^I$ ($\tau^I \epsilon$) goes with a pair of $SU(2)_w$ doublet (anti-)fermions