Speaker
Fabian Esser
Description
Neutral triple gauge couplings (NTGCs) provide important tests of the gauge sector of the SM and are searched for at the LHC via the process $pp \rightarrow ZZ \rightarrow 4l$ with two on-shell Z bosons.
In the SMEFT, NTGCs are produced at dimension-8 and at 1-loop order, making them doubly suppressed.
A promising alternative interpretation to NTGC searches are SM extensions with vector-like quarks (VLQs), which produce ZZ final states at tree-level.
I will discuss example models with VLQs and explain constraints on the model parameters from low-energy measurements.
Then, I will present the current and future sensitivities of the parameters from $pp \rightarrow ZZ \rightarrow 4l$ searches.
Authors
Fabian Esser
Martin Hirsch
Dr
Ricardo Cepedello
(Universidad de Granada)
Prof.
Veronica Sanz Gonzalez
(Universities of Valencia and Sussex)
