In this note, we give a definitive basis for the dimension-eight operators leading to quartic—but no cubic—interactions among electroweak gauge bosons. These are often called anomalous quartic gauge couplings, or aQGCs. We distinguish in particular the CP-even ones from their CP-odd counterparts.
Durieux, G., Remmen, G., Rodd, N. L., Éboli, O., Gonzalez-Garcia, M. C., Kondo, D., Murayama, H., & Okabe, R. (2025). LHC EFT WG note: Basis for anomalous quartic gauge couplings. SciPost Physics Community Reports, 0, 6. https://doi.org/10.21468/SciPostPhysCommRep.6 (Original work published 2025)